how do you ascend SAFELY???

[MikeFerrara]

Thanks for the history Thal. They neglect to put a lot of that in the books.

 

[shark_tamer]

-how many feet per minute - Follow the PDC ... that's 30fpm
-how long of a safety stop do you do if you do one - 3 minutes
-at what dept do you do the stop - 5 meters
-do you do deep stops - No

 

[Vayu]

Ascent rate: Slow and steady.

Stops: In general, one minute at half max depth and one minute at 30', 20', 10' or 10fpm ascent rate from 33' and up.

Deep stops: Yes.

In addition, I plan to have enough gas to complete all stops and maintain a normal ascent rate with a buddy should they have to borrow some EANx.

-V

 

[Thalassamania]

Thanks for the history Thal. They neglect to put a lot of that in the books.

A long memory can be a curse for us all.<G>

 

[Cacia]

The bottom line for recreational divers is that it is reasonable to use a 60 F/M ascent to a deep stop for one to two minute stop at half your maximum depth (unless your computer complains) followed by a 30 F/M ascent to a &#8220;safety stop&#8221; of two minutes between 20 and 15 feet, followed by a 30 F/M or slower ascent to the surface. Maintaining maximum permissible outgassing pressure, as discussed by previous posters, is another benefit of a 60 F/M ascent to your deep stop.

So...if I ran the world I would make that a sticky.

 

[dbombtek]

ill say it just because everyone else has in "SSI" ow class as of july 06 assent was 30ft per min, safety stop at 15 feet for 3 to 5 min optional but recommended. If necessary you could assend at 60ft per min but never ever ever ever ever ever ever out run the smallest bubble!

 

[Thalassamania]

ill say it just because everyone else has in "SSI" ow class as of july 06 assent was 30ft per min, safety stop at 15 feet for 3 to 5 min optional but recommended. If necessary you could assend at 60ft per min but never ever ever ever ever ever ever out run the smallest bubble!

Damn good advise, but the problem is that the smallest bubble keeps getting bigger!<G> Anyone remember those little yellow balls that were suppost to float up at 60 F/M? I've still got a few sets somewhere in the garage.

 

[dumpsterDiver]

This is pretty much exactly what I do now, however I add a little light exercise at the stops, with particular attention to maintaining circulation in my shoulders and elbows.

 

[Gator Diver]

ill say it just because everyone else has in "SSI" ow class as of july 06 assent was 30ft per min, safety stop at 15 feet for 3 to 5 min optional but recommended. If necessary you could assend at 60ft per min but never ever ever ever ever ever ever out run the smallest bubble!

Yeah, the bubble thing...my OW instructor told us when you actually are out
on your dive and you forgot all the numbers....just don't outrun
the bubble and you should be okay...

Now I usually hear a beep from my computer if I ascend too quickly.
Nice having technology around.

 

[Bill51]

The bottom line for recreational divers is that it is reasonable to use a 60 F/M ascent to a deep stop for one to two minute stop at half your maximum depth (unless your computer complains) followed by a 30 F/M ascent to a “safety stop” of two minutes between 20 and 15 feet, followed by a 30 F/M or slower ascent to the surface. Maintaining maximum permissible outgassing pressure, as discussed by previous posters, is another benefit of a 60 F/M ascent to your deep stop.

Now the question is do you do the deep stop at half the gauge depth or do you use Haldane’s theory and do it at half the absolute depth?

While I have no problem (and will) ascend at 60fpm below 60', I do want to average 30fpm all the way to my safety stop. Below 60 foot I check my watch before my ascent and if I arrive at my safety stop before the time needed for a 30fpm average rate of ascent I add the remaining time to my 3 minutes.