Gas Calculators

Warning:

Results from these calculators are not verified. Neither the author nor this website are liable for any loss, damage, or injury, including death, which may result from engaging in either scuba diving, snorkeling, or any of the activities mentioned within this site. These tools and calculators are provided for educational and convenience purposes only and should not be used for planning or conducting actual dives.

Nitrox Mix Calculator


Mix (FO2) Depth PO2 EAD

%

fsw

ATA

fsw



PN2: ATA


  • For Best Mix: input Depth and desired PO2
  • For Maximum Operating Depth: input Mix and desired PO2
  • PO2s above 1.4 - 1.6 are considered to be dangerous
  • PN2s above 3.2 - 4.0 are considered to be narcotic


NOAA Recommended Maximum Oxygen Exposures
( Central Nervous System Oxygen Toxicity )

PO2 single
exposure
24 hour
exposure
ATA minutes % per
minute
minutes % per
minute
0.6 720 0.139 720 0.139
0.8 450 0.222 450 0.222
1.0 300 0.333 300 0.333
1.2 210 0.476 240 0.417
1.4 150 0.667 180 0.556
1.6 45 2.222 150 0.667

Sea Level Standard Pressure:

1 atmosphere = 14.696 psia
= 29.92 inches Hg
= 33.831 ft water ( at 60°F )
= 0 ft altitude

Nitrox Fill Calculator


Current Fill %O2 at psi
Fill Mix %O2 Nitrox, balance: air
Nitrox + Air psi Nitrox + psi air
Target Fill % O2 at psi


Gas Consumption Calculator


SAC Depth Time Volume

cft/min

fsw

min.

cft



Tank Temperature / Pressure


Starting
Temperature
Starting
Pressure
Ending
Temperature
Ending
Pressure

deg F

psig

deg F

psig



Common Conversions


Metric Units

Proper Units

deg C deg F
meters feet
Bar psi
kilograms pounds
grams ounces
liters cubic feet
kilowatts horsepower




Here is an assortment of large sharks that can be found in New Jersey waters, by no means all of them. These are more likely to be found inshore in coastal waters. Sharks are seldom a danger to divers, they seem to be put off by the noise and bubbles. Nonetheless, all should be treated with caution.

In all my many inlet dives, I have seen a shark once, and that was in inoffensive Smooth Dogfish. I have been told that they are sometimes seen from up on the bridge in Belmar, but even then they would probably be out in mid-channel, and far away from strange noisy bubbling scuba divers. However, one of the most famous shark attacks of all time took place in New Jersey - the 1916 Matawan Creek attacks. See Bull Shark for details.

The only one of these that you are ever likely to encounter in local ocean diving is the relatively inoffensive Sand Tiger, not the similarly named and extremely dangerous Tiger.