Can somebody tell me the differences between the Oceanic fist stages, namely
the SP4, the DX4 and the CDX5.
I believe the SP4 is a piston type, while the others are diaphragm. The SP4
was rated very well by diver mag, but doesn't seem available anymore. I can

I have a citizen hyper aqualand. It always worked fine.
It automatically stops the dive bottom time counting adn starts
counting surface internval as come to surface and then after some
minutes it will consider a new dive.

Does the Suunto divelog S/W graph air consumption ?
I'm guessing it doesn't since I couldn't find any mention of it in the
on-line info, but I'm curious.
Thanks,

$395FIRM on this as new top of the line reg.2weeks old.My dealer wants $725

Need a new knife...want titanium, lightweight, no
disassembly...thinking of buying the Aquatec T-REX Titanium Knife.
http://www.aquatecusa.com/t-rex.htm
Anyone use it?  Pros/cons?  Like it/dislike it/why?  Appreciate any

Should cylinders be stored empty or full if they are not going to be used
for some time?
Thanks.
--

I bought a titanium diving knife today......I was thinking I was getting a
drop point knife, instead once I got home there was a blunt point knife in
the box.....My question is what are the pros and cons for each and whats the
need use for the blunt tip???  I thought divers would ...

I just purchased a new Sherwood Avid BC with a Blizzard Reg and Octopus. I
have approx 4 dives on this equipment and am now considering taking a Nitrox
course. Can I use this equipment with the Nitrox or will I need a different
Regulator? Thanks

I am new to snorkling, and scuba for that mater,  have just started my PADI
course, and have been out snorkling a few times just to get in the water,
wondering if anyone can offer me some wise old advice about breathing
techniques for scubadiving,  breath holding kinda stuff,  ...

I have gained some weight and my old BC (a Scubapro Double Black from the
late 1980's) no longer fits me.
My dealer recommended the Scubapro Knighthawk for me.  I tried it on and the
fit was good.  It is adjustable over the shoulders and fits around the bulk

I am in a debate why a diver uses more oxygen/minute as he/she goes deeper.
My scuba friend says it is because the water pressure compresses the air in
the tank.
I don't see how water pressure can affect the volumn of air in a steel tank.

I read something about the fac that Poseidon regulators are not DIR, but I
cannot find the reasons.
Does someone have more info?
Greets,

Hi, I've recently been thinking about getting back into SCUBA (was
certified with NAUI up to rescue several years ago, but had to stop
for a while because of moving inland for a while). However, my budget
is kind of limited, and I was hoping for some advice on some

My wife and I are heading to Curacao in October and plan on doing a fair
amount of snorkeling while we are there.  I am pretty comfortable in the
water but my wife, while she has enjoyed snorkeling on other trips we have
made (Jamaica & Aruba) tends to get a little claustrophobic at ...

I have a very old depth gauge after 10 years of no use i used it again
and it got flooded.
It doesnt work now.
I opened the clear cover by unscrewing it.