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This may be of interest, high definition 3D scan of the titanic. https://www.bbc.com/news/science-environment-65602182.amp?fbclid=IwAR07wgis4kcktlRqZ7jEC3HxF5X1mqfIpy3eDdlgmfPQcBzxepd95zYhf3E

Does anyone have any contacts or recommendations for boats running trips to the Jutland wrecks? I assume we the boat would be based out of Norway. Cheers Gareth

As @Wibble says, creating a spreadsheet with cylinder capacity and is a good way of getting a visual view of how long a cylinder with a specified amount of gas will last at differing depths and differing breathing rates. The pdf is laid out similar to the BSAC88 tables, a format I am familiar...

The rules are simple for a Nitrox / Air buddy pair. The Air diver MUST respect the MOD of the Nitrox diver, and understand that this must never be broken. The Nitrox diver MUST follow the air divers decompression schedule (either NDL or decompression).

The first rebreather i dived was an Inspiration classic, i.e. no temp stick. My first proper unit was an inspiration vision, with a temp stick. As someone else stated, I pre breath the unit until the temp stick reacts. If it doesn't, then there is something wrong so I abort the dive. I've had...

I am not sure that is a true statement. Air will migrate to the highest point. If you are head down and feet and arse up, then it will migrate to your feet. If you are flat, your shoulder is one of the high points, especially if you roll slightly. Ascending with one of my old buddies (who was...

If you take something into the water in a housing that is designed to protect it from the water, you can guarantee that at some point you will have a flood. Can you afford to flood your iPhone? It is not a case of if you have a flood, it is when you have a flood! I take a camera. I flooded one...

If you read the statement. It says diving to a depth NO GREATER than 40m. Using compressed air OR Nitrox (with NO MORE than 40% oxygen) as a breathing gas. At no time does it say a dive to 40m using 40% Nitrox. It does say a 40m dive using air or 27% Nitrox No - stop is within the...

Also we think volume All cylinders are measured in litres. i.e 7, 10, 12, 15. Gas pressure is measured in bar i.e 230bar. A 10 litre cylinder contains 2300 litres of gas (@230bar). If you are following the basic (no-stop) rule of 50bar reserve. - that's 180 x10 = 1800 litres of available gas...

SAC is used to calculate how much Gas you expect to use in a given time. You calculate turn pressures based available gas. If your breathing rate is higher than expected, then you will reach the turn pressure earlier than expected. So you will turn for home early. This does not account for a...

I (we) use bar (pressure), minutes (time) SAC - Surface Air Consumption. RMV seems to be more a (North) American thing.

I am more than happy to promote UK diving (and boats with lifts is generally the norm' here), but the waters are a little cool, so drysuits are the norm' here. Places like the Red Sea, although they still have ladders. De-kitting in the water, and then climbing the ladder, and the crew/dive...

I probably didn't vote in the poll. Finally a consensus:yeahbaby: We are two nations separated by a common language (and a F***ing great Ocean) - to quote a few people!! In diving, its not helped by different units of measurement ---- as NASA has found out a few times!!!

My 15l/min SAC is the surface gas consumption rate. It can't be higher at the surface than at depth. For every 10m of depth (33ft), pressure increases 1 bar (1 Atmosphere, 14.7psi). So a SAC of 15l/min = 30l/min @ 10 m (33ft), 45l/min @ 20m (66ft), 60l/min @ 30m (99ft) 75l/min @ 40m (132ft)...

But for a SAC of 2 bar/minute to be useful, you need to know the cylinder size, and you have to recalculate for each cylinder size. However, it does make far more sense than saying SAC is based on your depth. Knowing you expect to use 8 bar a minute during your dive at the expected depth is a...

I can understand RMV being misleading, i.e it could relate to the surface, or to a specified depth. But SAC is not ambiguous, it is a rate of gas consumption at the surface in the units specified.

If you provide a buddy (European?), or team (European?) with your SAC, in litres per minute., and the proposed site depth. They can calculate the dive time for any cylinder set that is available. Perhaps more relevantly, if we are looking at buddy diving. They can calculate the turn pressure...

I also don't entirely understand what use a Surface Air Consumption (SAC) rate defined in pressure per minute is. It gives no useful or transferable information. A Surface Air Consumption (SAC) rate of 2 bar per minute is a useless figure. Is it for a 7 litre cylinder, a 10 litre cylinder, a...

I am still struggling to understand how surface air consumption (SAC), could be the gas consumption rate at depth. Surface Air Consumption, is what it says on the tin. The rate of gas consumption at the surface in the units you define, be they litres per minute, or cubic feet per minute, US...

I can understand confusion over units. But not that it is a Surface Air Consumption number. I have to say, it could make the maths far easier for you American cousins, if you adopted metric units.