The only gear you have is a dive watch...

[Tigerman]

So what youre saying is canada == britain?

The bar/psi thing is pretty insignificant. If my tank holds 200 somethings or 6000 somethings is pretty irrelevant unless you want to calculate your exact air usage. 50 is a quarter of 200, 1500 a quarter of 6000. So if I used 1500 somethings I used 25% of my air, as I did if I used 50/200..

Depth I can ballpark fairly easilly anyways (not that it matter, given I have a depth gauge on the dive watch, which I always wear) - 30ft = 9m (not exactly but ish), 60ft = 18mish (OW recommended limit), 100ft = 30mish. Anything in between? If Im not deeper than 100ft and narced, I can figure it out to "close enough"

 

[Centrals]

As long as it is being spelled correctly eg. aluminium and colour.
Incidentally, 1 stone is 14lbs and 1 ton is 2240lbs.

 

[PfcAJ]

if everyone would just speak American no one would be confused.

metric...bah... with your logic and simple units... not on my watch!

 

[Centrals]

if everyone would just speak American no one would be confused.

Some of the Taiwanese(Republic of China) that I had met do believe ONLY the American speak English. They had never heard a place call England!!!!

 

[windapp]

I don't know of any dive op that rents regulator sets without a depth gauge, and a copy of the RDP is pretty easy to get hold of if I can't rent a computer. I am not going to do some super challenging dive spur of the moment (certainly not with an instabuddy), so I think the answer to the question is pretty self-evident.

And I certainly don't think this thread belongs in the advanced forum.

 

[windapp]

Almost forgot. You won't be renting any gear for the dive if all you have is a watch (no c card), so you will be skin diving anyway, and you won't need to do NDL calculations.

 

[Tortuga68]

I've rented dive gear on vacation without a c-card, and there are several agencies where you can check online

 

[Tortuga68]

Almost forgot. The guy won't be going diving because he'll get arrested for exposing himself because he's only wearing his watch

 

[windapp]

So what youre saying is canada == britain?

The bar/psi thing is pretty insignificant. If my tank holds 200 somethings or 6000 somethings is pretty irrelevant unless you want to calculate your exact air usage. 50 is a quarter of 200, 1500 a quarter of 6000. So if I used 1500 somethings I used 25% of my air, as I did if I used 50/200..

Depth I can ballpark fairly easilly anyways (not that it matter, given I have a depth gauge on the dive watch, which I always wear) - 30ft = 9m (not exactly but ish), 60ft = 18mish (OW recommended limit), 100ft = 30mish. Anything in between? If Im not deeper than 100ft and narced, I can figure it out to "close enough"

Since when is 200 bar equivalent to 6000 of anything?

 

[Jerry_]

(Back to the initial post).

If you can't get the minimum set of equipment or do not feel comfortable about it, don't dive!

But usually diveshops should be able to rent you almost anything required. Diving on tables is fine, as long as you know time and depth (so a watch is not enough), but you can go for watch sized divecomputers (see f.i. Suunto D4).

The rules of thumb given are both valid for NDL time, just pay attention that the 45 rule is for the metric system, and the 140 rule for measuring deth in feeds.