Wednesday, 12 September 2007
|
| sonar on ebay Ceres 18:53:23 |
| | Side Scan Sonar Edge Tech EG&G 272T / wreck hunting
On ebay:
http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&rd=1&item=170148760929&ssPageName=STRK:MESE:IT&ih=007
SONAR A BALAYAGE LATERAL
Side Scan SONAR Edge Tech EG&G 272T towfish, 100 Khz Perfect state.
The best sonar for wreck and shipwreck research & recovery, treasure
hunting, wreck hunting.
This Side Scan Sonar been used for a long time but completely refited
and repainted with EG&G logos.
Tested recently in shallow water, working well.
Two pairs of wings, nice wooden white box, 55kg .
More informations, sonar imageries, shipwrecks and mosaiks on www.ceresm.com
Feel free to contact directly www.ceresm.com for further informations
272-T Tow Fish
Frequency 100 kHz - 105 ± 10 kHz
Horizontal Beam Width 100 kHz – 1.2° (3 dB points)
Operating Range (maximum) 100 kHz – 500 meter swath
Optimum Operating Depth 1000 meters
Tow Cable Type 7 conductor
Tow Fish Diameter 11.4 cm (4.5”)
Tow Fish Length 140 cm (55”)
Towing Speed (operational) 3 – 5 knots
Weight (in air) 25 kg (55 lbs)
Weight (in saltwater) 12 kg (26 lbs)
Provide High Resolution Seafloor Images
The Model 272 towfish is a hydro dynamically stable, towed body
that contains the electronics and transducers necessary to generate and
receive side scan sonar signals. It is designed for use at depths up to
1000 meters. Various tow cable systems provide the mechanical means for
towing the fish near the seafloor and the electrical means for powering
the fish, triggering the transmitters, and sending the return signal to
the topside for processing and display.
The Model 272-T towfish incorporates circuits for transmitting and
receiving the 100 kHz side scan sonar frequency.
The Model 272-T towfish feature the patented Saf-T-Link® shear
pin feature. When cable tension on the towfish exceeds 180 Kg (400 lbs.)
due to snagging on the seafloor or mooring lines, the nylon pin shears
and the electrical connector between the cable and tow fish separates.
The towfish then "flips" 360 degrees, transferring the tow point to the
nose of the towfish and allowing it to be pulled clear of the
obstruction. Normal operation is easily restored by remounting the
towing arm with a new shear pin and refastening the connector. If only
the tail fins snag, they will fall away and be loosely held by a nylon
cord. The cord is designed to break if the snag persists to avoid loss
of the towfish.
272-T features a patented Time Varied Gain (TVG) circuit that
compensates for the known signal losses versus range. This not only
facilitates processing, but also reduces the dynamic range requirements
of the tow cable, thus reducing the susceptibility to electrical nose
pickup.
272-T can be towed with lightweight Kevlar tow cable or, for
deeper waters, by double armored steel-cables.
FEATURES
operates at 100 kHz, Time varied Gain, Saf-T-Link towing arm, Breakaway
tail fins, Lightweight for one-person deployment/recovery, Corrosion
resistant
Rugged, modular construction for ease of maintenance
APPLICATIONS
Shipwrecks research & recovery / Hydrographic surveys / Channel
conditioning and clearance surveys / Geological surveys / Cable and
pipeline surveys / Search and Recovery / Site selection surveys /
pre/post dredging surveys / Mine countermeasures / Treasure hunting
I. SEAFLOOR SEARCH
This is the process of detecting and recognizing a seabed anomaly using
sonar for the purpose of identification, disposal, or retrieval.
Detection is a function of sonar design and acoustical physics while
recognition is highly dependent upon the eye-brain interface and
operator experience. Typically, small objects on the bottom can be
partially or completely buried, or, in shallow or deep moored
configurations. Small objects are detected by the size and shape of the
acoustic shadow, which is a derivation of the acoustic reflection, fish
altitude, and grazing angle at which the sound waves strike the object.
Applications for marine search include: Explosive Ordnance Disposal,
Q-Route Survey, Site Clearance, Search and Recovery of Downed Aircraft
and Sunken
Shipwrecks.
Mine Countermeasures
The search and disposal of underwater mines requires constant effort on
the part of militaries worldwide. Shipping channels must be kept open
and free from mines.
Over the past decade, Sonar data acquisition and image processing system
has played a critical role in the identification of underwater mines
worldwide. 272T have been used internationally.
Aircraft Search and Recovery
Edgetech products have aided in the search and recovery of downed
commercial and military aircraft worldwide.
Search and Recovery of Shipwrecks
Some of the world's most highly publicized shipwrecks have been found
with 272T
Small object Search and Mining
II. HYDROGRAPHIC SURVEY
This is the mapping of the seafloor topography utilizing various
sensors, including single and multibeam sonars. Surveys are conducted to
produce nautical charts for safe navigation or to provide the detailed
mapping of pipeline and underwater cable routes.
Pier and Harbor Survey
The Sonar data acquistition and image processing system provides
detailed information on survey depths of harbors by providing real-time
graphical displays of data. This information allows for safe navigation
of marine traffic. Isis also offers details of the underwater condition
of harbor walls to help identify weaknesses and hazards.
Breakwater Survey Breakwaters are built to protect harbors from damaging
storms. The harsh marine environment often degrades the breakwaters
leading to unsafe navigation around the area. Locating damaged areas of
the breakwater before a failure is critical. This can be accomplished
with 272T Sonar .
Dam/Reservoir Survey
The Sonar in conjunction with multibeam systems make it possible to map
intricate stilling basins associated with dams and reservoirs. Surveys
are conducted to detect hazards caused by erosion, or to provide
valuable, up-to-date information for the accurate computation of water
storage volumes.
III. DREDGE WORK
Pre/Post Dredge Survey
Two surveys are usually conducted to support dredging operations;
Preliminary and Post survey operations. This information allows the
dredge to determine how much area is required to be removed and to then
produce a final survey to verify that the depth meets all navigation
requirements. High accurate survey data is required. The 272T sonar has
gained international acceptance as one of the most efficient and
accurate data acquisition and processing system.
Dredge Support
During dredging operations, survey support in the work area allows the
operator to determine if the correct depth has been achieved. An
isolated pile or missed area can result in higher costs if the dredge
must return to the area. The sonar can provides real-time coverage of
the area, providing very accurate depth measurements for the operator.
IV. SAFETY AND INSPECTION WORK
Bridge abutment Inspection
Every railroad, roadway or bridge over a river is suspect to the
potential underwater erosion of its supporting piers. (A high current
area can quickly lead to erosion and possible failure of the structure.)
Rivers can quickly erode the sediment beneath the support, weakening
bridge supports and potentially lead to structure failure.
River Flooding Support
Several countries have experienced severe flooding to low lying areas
because of unusual changes in World climatic conditions. Water levels of
major rivers have risen and broken their banks.
Rock Dumping
Rock dumping is the accurate placement of rocks onto the seafloor to
achieve a specific objective. Typically rocks are placed over an exposed
pipeline laying on the seafloor. Time and materials are saved if the
placement is exact.
Pipeline Inspection
Underwater pipelines require periodic inspections and maintenance to
reduce risk. The inspections determine if they have become exposed, or
if any erosion beneath the pipeline may have created excessively long
spans, making it vulnerable to rupturing. The Sonar Pipeline Inspection
System tracks up to four pipelines simultaneously, generates on-screen
tags, reports in real-time and automatically detects free spans, scour,
burial and other anomalies.
|
| | Add comment |
|
| side scan sonar Ceres 18:53:10 |
| | Side Scan Sonar Edge Tech EG&G 272T / wreck hunting
On ebay:
http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&rd=1&item=170148760929&ssPageName=STRK:MESE:IT&ih=007
SONAR A BALAYAGE LATERAL
Side Scan SONAR Edge Tech EG&G 272T towfish, 100 Khz Perfect state.
The best sonar for wreck and shipwreck research & recovery, treasure
hunting, wreck hunting.
This Side Scan Sonar been used for a long time but completely refited
and repainted with EG&G logos.
Tested recently in shallow water, working well.
Two pairs of wings, nice wooden white box, 55kg .
More informations, sonar imageries, shipwrecks and mosaiks on www.ceresm.com
Feel free to contact directly www.ceresm.com for further informations
272-T Tow Fish
Frequency 100 kHz - 105 ± 10 kHz
Horizontal Beam Width 100 kHz – 1.2° (3 dB points)
Operating Range (maximum) 100 kHz – 500 meter swath
Optimum Operating Depth 1000 meters
Tow Cable Type 7 conductor
Tow Fish Diameter 11.4 cm (4.5”)
Tow Fish Length 140 cm (55”)
Towing Speed (operational) 3 – 5 knots
Weight (in air) 25 kg (55 lbs)
Weight (in saltwater) 12 kg (26 lbs)
Provide High Resolution Seafloor Images
The Model 272 towfish is a hydro dynamically stable, towed body
that contains the electronics and transducers necessary to generate and
receive side scan sonar signals. It is designed for use at depths up to
1000 meters. Various tow cable systems provide the mechanical means for
towing the fish near the seafloor and the electrical means for powering
the fish, triggering the transmitters, and sending the return signal to
the topside for processing and display.
The Model 272-T towfish incorporates circuits for transmitting and
receiving the 100 kHz side scan sonar frequency.
The Model 272-T towfish feature the patented Saf-T-Link® shear
pin feature. When cable tension on the towfish exceeds 180 Kg (400 lbs.)
due to snagging on the seafloor or mooring lines, the nylon pin shears
and the electrical connector between the cable and tow fish separates.
The towfish then "flips" 360 degrees, transferring the tow point to the
nose of the towfish and allowing it to be pulled clear of the
obstruction. Normal operation is easily restored by remounting the
towing arm with a new shear pin and refastening the connector. If only
the tail fins snag, they will fall away and be loosely held by a nylon
cord. The cord is designed to break if the snag persists to avoid loss
of the towfish.
272-T features a patented Time Varied Gain (TVG) circuit that
compensates for the known signal losses versus range. This not only
facilitates processing, but also reduces the dynamic range requirements
of the tow cable, thus reducing the susceptibility to electrical nose
pickup.
272-T can be towed with lightweight Kevlar tow cable or, for
deeper waters, by double armored steel-cables.
FEATURES
operates at 100 kHz, Time varied Gain, Saf-T-Link towing arm, Breakaway
tail fins, Lightweight for one-person deployment/recovery, Corrosion
resistant
Rugged, modular construction for ease of maintenance
APPLICATIONS
Shipwrecks research & recovery / Hydrographic surveys / Channel
conditioning and clearance surveys / Geological surveys / Cable and
pipeline surveys / Search and Recovery / Site selection surveys /
pre/post dredging surveys / Mine countermeasures / Treasure hunting
I. SEAFLOOR SEARCH
This is the process of detecting and recognizing a seabed anomaly using
sonar for the purpose of identification, disposal, or retrieval.
Detection is a function of sonar design and acoustical physics while
recognition is highly dependent upon the eye-brain interface and
operator experience. Typically, small objects on the bottom can be
partially or completely buried, or, in shallow or deep moored
configurations. Small objects are detected by the size and shape of the
acoustic shadow, which is a derivation of the acoustic reflection, fish
altitude, and grazing angle at which the sound waves strike the object.
Applications for marine search include: Explosive Ordnance Disposal,
Q-Route Survey, Site Clearance, Search and Recovery of Downed Aircraft
and Sunken
Shipwrecks.
Mine Countermeasures
The search and disposal of underwater mines requires constant effort on
the part of militaries worldwide. Shipping channels must be kept open
and free from mines.
Over the past decade, Sonar data acquisition and image processing system
has played a critical role in the identification of underwater mines
worldwide. 272T have been used internationally.
Aircraft Search and Recovery
Edgetech products have aided in the search and recovery of downed
commercial and military aircraft worldwide.
Search and Recovery of Shipwrecks
Some of the world's most highly publicized shipwrecks have been found
with 272T
Small object Search and Mining
II. HYDROGRAPHIC SURVEY
This is the mapping of the seafloor topography utilizing various
sensors, including single and multibeam sonars. Surveys are conducted to
produce nautical charts for safe navigation or to provide the detailed
mapping of pipeline and underwater cable routes.
Pier and Harbor Survey
The Sonar data acquistition and image processing system provides
detailed information on survey depths of harbors by providing real-time
graphical displays of data. This information allows for safe navigation
of marine traffic. Isis also offers details of the underwater condition
of harbor walls to help identify weaknesses and hazards.
Breakwater Survey Breakwaters are built to protect harbors from damaging
storms. The harsh marine environment often degrades the breakwaters
leading to unsafe navigation around the area. Locating damaged areas of
the breakwater before a failure is critical. This can be accomplished
with 272T Sonar .
Dam/Reservoir Survey
The Sonar in conjunction with multibeam systems make it possible to map
intricate stilling basins associated with dams and reservoirs. Surveys
are conducted to detect hazards caused by erosion, or to provide
valuable, up-to-date information for the accurate computation of water
storage volumes.
III. DREDGE WORK
Pre/Post Dredge Survey
Two surveys are usually conducted to support dredging operations;
Preliminary and Post survey operations. This information allows the
dredge to determine how much area is required to be removed and to then
produce a final survey to verify that the depth meets all navigation
requirements. High accurate survey data is required. The 272T sonar has
gained international acceptance as one of the most efficient and
accurate data acquisition and processing system.
Dredge Support
During dredging operations, survey support in the work area allows the
operator to determine if the correct depth has been achieved. An
isolated pile or missed area can result in higher costs if the dredge
must return to the area. The sonar can provides real-time coverage of
the area, providing very accurate depth measurements for the operator.
IV. SAFETY AND INSPECTION WORK
Bridge abutment Inspection
Every railroad, roadway or bridge over a river is suspect to the
potential underwater erosion of its supporting piers. (A high current
area can quickly lead to erosion and possible failure of the structure.)
Rivers can quickly erode the sediment beneath the support, weakening
bridge supports and potentially lead to structure failure.
River Flooding Support
Several countries have experienced severe flooding to low lying areas
because of unusual changes in World climatic conditions. Water levels of
major rivers have risen and broken their banks.
Rock Dumping
Rock dumping is the accurate placement of rocks onto the seafloor to
achieve a specific objective. Typically rocks are placed over an exposed
pipeline laying on the seafloor. Time and materials are saved if the
placement is exact.
Pipeline Inspection
Underwater pipelines require periodic inspections and maintenance to
reduce risk. The inspections determine if they have become exposed, or
if any erosion beneath the pipeline may have created excessively long
spans, making it vulnerable to rupturing. The Sonar Pipeline Inspection
System tracks up to four pipelines simultaneously, generates on-screen
tags, reports in real-time and automatically detects free spans, scour,
burial and other anomalies.
|
| | Add comment |
|
| Belize. Hmmm Dillon Pyron 14:56:23 |
| | I'm in the radiography program here in Austin, with a planned
graduation of August 2009. I just noticed that the Belize healthcare
system has several openings for radiographers. The pay isn't
spectacular compared to the US, but compared to the median income in
Belize, it's fantastic!
Chilly, they are also looking for RNs. That's you, isn't it?
--
dillon
Elvis is still dead
|
| |  3 answer | Add comment |
Tuesday, 11 September 2007
|
| Re: Diving off of Bermuda ? Fred 19:01:06 |
| | I dove in Bermuda, water was crystal clear and not quite 82% so
wetsuit(rental smelled like but the wrecks were nice. We stayed at Elbow
beach and had breakfast/dinner plan. Dove at Sonesta hotel, so I drive vespa
like wheels with my gear every morning. Was expensive but another diving
adventure/ Wife doesn't dive so I was back by 12 or so and off exploring
Bermuda.
Fred
<hierophantfish@hotmail.com> wrote in message
news:1188014295.450149.162710@q3g2000prf.googlegroups.com...
On Aug 22, 9:56 am, -hh <recscuba_goo...@huntzinger.com> wrote: For point of reference, the summer rates at Pirate's Point on Little Cayman is $1650/pp-week, plus tips but including diving, food, room and (most) drinks. Just add airfare, which is probably not going to be that much worse than Bermuda. If that's a bit too much, or if 2 dives/day with gourmet food isn't quite your style, there's McCoy's Lodge, which is around $600 cheaper per week. When your choice is Little Cayman vs. Bermuda, which do you think more folks would prefer? I see that two people who have actually been to Bermuda have answered so far : Rosalie B and nb318. I can't find prices on M.Y. Bermuda IV on line so I guess I'll have to phone them.
|
| | Add comment |
Thursday, 7 June 2007
|
| Cancun recomendations??? Buhda 07:24:28 |
| | We will be traveling to Cancun next week and staying at the Moon Palace.
Having never been to Cancun we'd like some recomendations.
1) Dive operations: We've tried to contact Solo Buceo by email with no reply
after 4 days. So looking for something else.
2) Dive sites that we could request.
|
| | 2 answer | Add comment |
Wednesday, 6 June 2007
|
| more info on nice place Manuelrodriguez 21:36:08 |
| |
I just heard this, my other friend defined this place:
'mallorca property' (http://www.propertymallorca.org/) : It can be
considered a jewel of the western part of Mediterranean. Its isolation
condition has influence in its unique fauna ,flora and natural places.
'tenerife property' (http://www.tenerifeproperty.biz/) : newcomers can
meet the happiness and kindles of its people, tourists and foreign
visitors are greatly attended, that enhances Tenerife with a
cosmopolitan history that makes of Tenerife a great place where to
enjoy.
I can't wait to visit that place
--
manuelrodriguez
------------------------------------------------------------------------
manuelrodriguez's Profile: http://forum.scubish.com/member.php?userid=151
View this thread: http://forum.scubish.com/showthread.php?t=41826
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|
| | 3 answer | Add comment |
|
| Re: (Long) Trip Report -- Galapagos Daniel Kessler 16:54:06 |
| |
'mille grazie' for your fine report...
|
| | Add comment |
|
| Dive Tahiti Stephen Peck 08:26:16 |
| | Any recommendations for diving in Tahiti for 2008. We're considering a Star
Clipper ship instead of a liveaboard or ground based dive shop.
|
| | Add comment |
Tuesday, 5 June 2007
|
| Vacation_Spain Manuelrodriguez 12:24:23 |
| |
To have a vacation is great. And one of your choice is ' San Sebastian
Spain' (http://www.sansebastianspain.info/). One of the great place in
Spain. Its a place with lots of views and interesting sites. Nightlife
is very popular in this place. To enjoy a vacation, lets go shopping.
The best way of having a vacation. Its a great day to have a vacation
like this.
I beg you all, ... Feel free to check.
--
manuelrodriguez
------------------------------------------------------------------------
manuelrodriguez's Profile: http://forum.scubish.com/member.php?userid=151
View this thread: http://forum.scubish.com/showthread.php?t=41903
http://www.scubish.com
|
| | Add comment |
|
| OMS Bladder Replacement Ken 08:14:06 |
| | Anyone know how to replace the bladder in a OMS BC Wing? I'm having
trouble getting the fittings through the holes, I don't want to rip
the new bladder. Is there a way to stretch the holes? Possibly hot
water? Any help would be appreciated. Thanks.
|
| | Add comment |
Monday, 4 June 2007
|
| ? on Florida diving BosquePhantom 15:11:38 |
| | After an absence of several years, my wife and I want to return to scuba
diving. We live in Waco, Texas and there is no decent diving within light
years of this place.
We have (in the distant past) been to Grand Cayman and Cozumel. This time
we would like to be able to drive to a location.
I am looking for any comments, either positive or negative, about the
Florida pan handle. Specifically, the Destin area. We realize this is not
a first class scuba destination but are hoping that it may be fine for our
return.
I get sea sick easily. Are there any places in that area which allow shore
diving? If Destin is just a bum destination for scuba, can anyone offer any
suggestions for the nearest location in Florida that might have better
diving?
Thanks in advance for any comments.
|
| | 4 answer | Add comment |
|
| Galapagos dive trip Q... Darryl 07:46:41 |
| | A friend of mine is currently awaiting confirmation on the MY Mistral
and she's been waitlisted on the Aggressor. In the meantime, I was
wondering if anyone could suggest another (available) dive trip around
June 11th (yes, 2007) for one week in the Galapagos? Price range
USD$3-4k.
TIA!
Darryl.
(email appreciated).
p.s., cross-posted to rec.scuba.
|
| | Add comment |
Saturday, 2 June 2007
|
| Oxygen cleaning question Bobboy 23:53:20 |
| | At what % o2 should a reg be O2 clean I am looking at deco'ing on 60%
but dont want to O2 clean a reg. Is it safe?
|
| | 17 answers | Add comment |
Friday, 1 June 2007
|
| Amazing place Manuelrodriguez 06:03:11 |
| |
A site for you:
number of monuments. With interesting attractions to see. A beach with
unforgettable to stay. They offer a great accommodation.
majestic mansion. With a city attractions like town halls, a cadiz
church. Landmarks here are worth visiting. The beauty of this place is
very amazing.
Feel free to check.
--
manuelrodriguez
------------------------------------------------------------------------
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View this thread: http://forum.scubish.com/showthread.php?t=41823
http://www.scubish.com
|
| | Add comment |
Thursday, 31 May 2007
|
| Sea scooter query. Capt. Beefheart 10:14:15 |
| | Hello, The wife & I are going to Koh Samui for a couple of weeks & we like
the idea of buying a sea scooter just for leisure really, we are not divers
but enjoy snorkelling. I have been looking at a 'Sea-Doo' sea scooter for
ё184 or a 'Swimate' sea scooter for ё99, it seems to be up to the job with a
250w motor & from the pictures looks well made. The Sea Doo looks like the
market leader with the big brand name but as we only intend light use a few
times a year should i buy 2 Swimates or 1 Sea Doo?
If you tell me the Swimate is crap i will get the Sea Doo.
Are any of them worth the money or are they naff toys? I've looked at a few
sites & seen divers using them but i would still like another opinion.
Thanks in advance.
Regards,
Beefheart.
|
| | 1 answer | Add comment |
|
| Inexpensive camera recommendation Eddie G 04:43:58 |
| | I bought the Sea life dc500 on ebay and will try it in a dive, but the few
indoor test pictures were very grainy when viewed on the computer screen. I
have NOT tried printing them.
Anyway, if the underwater pics do not come out too good I will be selling
this camera on ebay. What cameras would you recommend for around $500 US,
should I be in the market for a new camera?
Thanks!
Eddie G
|
| | 5 answers | Add comment |
Tuesday, 29 May 2007
|
| thailand in August- where to dive Sarahthor 06:16:24 |
| | Hi- I am going to Thailand this August in the rainy season and wondering
where the diving would be the best at this time of year with regards to
visibilty etc. I am a novice diver. Many thanks.
|
| | 16 answers | Add comment |
Monday, 28 May 2007
|
| Cayman Brac: Brac Reef Resort HW "Skip" Weldon 17:05:54 |
| | We're thinking of a few days at BRR. Have walked through the resort
many times (although it has been several years ago) and am familiar
with diving on the Brac. I also like buffet food.
Has anyone stayed there recently? If so how was it?
-HW "Skip" Weldon
Columbia, SC
|
| | 4 answer | Add comment |
|
| Car and Deep Cycle (including SLA) Battery FAQ Bill Darden 15:49:04 |
| | The Car and Deep Cycle Battery FAQ Web pages have been moved. They
are located at http://www.batteryfaq.org/. The latest version is 7.0,
dated May 28, 2007.
The FAQ is consumer oriented with answers to questions about lead-acid
batteries for car, motorcycle, power sports, truck, boat, marine,
recreational vehicle, solar, and other starting and deep cycle
applications. The Web pages also contain brand names, tips,
manufacturer contact information, technical references and hyperlinks.
Kindest regards,
BiLL......
|
| | Add comment |
Thursday, 24 May 2007
|
| Hose routing dilema Sarah 08:38:19 |
| |
There is a diver that is having problems with solving his hose routing
issues and I was wondering if you all could solve his problem.
You can find a photo of how he currently has it routed 'here'
(http://tinyurl.com/2fqnjd).
--
Sarah
Sarah -'ScubaMagazine' (http://www.scubamagazine.net) U/W Photo/Video
& Dive Discussion Community
------------------------------------------------------------------------
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View this thread: http://forum.scubish.com/showthread.php?t=41655
http://www.scubish.com
|
| | 8 answers | Add comment |
|
| Re: Sausage as dive flag? Lee Bell 07:44:42 |
| |
<SeanMartinFarrell@gmail.com> wrote in message
news:1177612881.390087.148450@o40g2000prh.googlegroups.com...
Hey I'm thinking of getting a safety sausage(below). I'm wondering if there are any issues with using it as a dive flag as well. It has diver below written in huge letters and has 30lb of lift.... The only thing I'm thinking could be a concern is people mistaking it for a sign of distress but if there is no flailing diver attached to it and has "Diver Below" writ large on it I'm thinking that won't be too bad. Whatcha think? Dive Safety/Signal Tube - 6 ft Sure-Sight Multi-Function Safety
It does not comply with Florida law.
Lee
|
| | 27 answers | Add comment |
Wednesday, 23 May 2007
|
| Re: Are consumer digital cameras useless for diving? Sheldon 13:19:50 |
| |
"Michael C" <nospam@nospam.com> wrote in message
news:462617c1$0$16555$afc38c87@news.optusnet.com.au...
I've noticed a couple of questions regarding dive cameras so thought I'd continue the trend. A friend spent $700 on a 6mp cannon camera with a dive case. I've noticed most of the pictures suffered from a severe lack of light and the camera automatically went to a long exposure causing many of them to be blured. Those that weren't blurred were quite dull. Only closeup shots were acceptable really. After having a look at the pics I'm kinda of the opinion that only a high quality camera with a full size lense (to let more light in) and a good external flash would be required to get acceptable photos. Is this true? I'm not a camera zealot if anyone is wondering as I quite happily take shots out of the water with a compact and reckon it is pretty good. I usually dive around the 18 metre mark. Here's some examples: The problem with most inexpensive cameras is that they adjust the shutter
speed to set the proper exposure, so when the light drops the shutter speed
goes down causing blurred pictures. While a flash is best underwater for
good color and clear pictures, you can try raising the ISO speed on the
camera (if adjustable). The photos should look fine, and this will give the
camera a chance to raise the shutter speed so your photos aren't blurred
anymore.
|
| | 16 answers | Add comment |
Monday, 21 May 2007
|
| Bonaire Janerene 00:10:44 |
| | Looking to go to Bonaire in a couple weeks. Any feedback on the Divi
Flamingo would be appreciated. Also, what is the cost of food over there?
I read they don't grow any of their own food sources over there, so I'm
thinking restaurant eating is going to be pretty high. Jane
|
| | Add comment |
Saturday, 19 May 2007
|
| Re: The "Gold Coast" of Costa Rica Jer 02:19:21 |
| | ralmquist@gmail.com wrote:
The Pacific coast of costa rica offers some great dive opportunities. For more information concerning the "Gold Coast" area, visit
I disagree. Often zero vis, too much runoff from the shoreline.
--
jer
email reply - I am not a 'ten'
|
| | Add comment |
|
