DPlan - Ascent / Descent Rates

You may specify Ascent and Descent Rates for both deep and shallow segments of a dive, along with a "split" depth in feet. Rates may be set between 10 and 100 feet per minute; no negative numbers. Un-checking the boxes disables Ascent / Descent modeling. This is not a good idea but is sometimes useful for comparing with old square-profile schedules and softwares. By default, only the first big descent is shown in the profile, the rest are suppressed from the display. If you want to see everything, check 'show'.


no snorkel

Here is an item that is useful in the tropics, but much less so around here. This is because the water here is not nearly as crystal clear as in the tropics, and the depths are often greater. Therefore it is unlikely you will be able to see anything interesting below from the surface.

On a boat dive, a snorkel is totally useless - leave it home. Chances are, the captain and crew will tell you to take it off anyway. The same is generally true for inlet diving where the entry is steep. A snorkel is just one extra thing to get tangled up, and you will probably have enough of that already. A snorkel might be useful in a surface swim from the beach out to a close-in dive site, if it is a good one with purge valve or a dry valve to keep the water out entirely. Even then, you are better off doing a backstroke out to the site, with your head out of the water so you can navigate by landmarks, or an underwater swim if the currents are favorable.

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