How frequently is it safe to scuba dive?

Answer 1

If you're a certified diver, you should have a dive table to figure out how many dives you can make safely within a certain time frame. There are several factors to consider: Depth of dives, length of dives, time between each dive, conditions, health, whether you'll be flying before or after the dives.

If you don't have a table and are still not sure, any dive center should be able to help you calculate the maximum dives for a given time frame.

Addition

While you should never be aggressive in your diving, it is well documented that you become less susceptible to decompression sickness the more you dive over time.