# How long should my surface interval be?

## How long should my surface interval be?

Surface Interval Time (SIT) must be at least 10 minutes between dives. If your SIT is less than 10 minutes, you must consider your second dive as a continuation of the first dive. NAUI recommends a SIT of at least one hour between dives. Use the next greater dive time if your dive is particularly cold or strenuous.

## What is a surface interval?

A surface interval (SI) is the time that a diver remains out of the water between two dives. During this time, the nitrogen absorbed during the first dive continues to off-gas, or to be released from a diver’s body. A diver has less nitrogen in his body at the end of a surface interval than at the beginning of it.

## How long can a scuba diver stay at 100 feet?

20 minutes
Nitrogen is absorbed more readily at deeper depths, making how long can you SCUBA dive dependent on how deep you are. For instance, the time you can spend SCUBA diving at 100 feet is 20 minutes whereas if you limit your dive depth to 35 feet, you could stay for 205 minutes (if you had enough air).

## How many dives can I do in a day?

For recreational divers, a typical limit is 4-5 dives per day as long as you follow dive tables or use a computer to track. For shallower depths, you will need to refer to dive tables to be able to determine how many dives you can safely do in a day and how long those dives can last.

## How deep can you dive without having to decompress?

There’s a bit of physics and physiology involved in a full explanation, but the short answer is: 40 metres/130 feet is the deepest you can dive without having to perform decompression stops on your way back to the surface.

## What is the minimum surface interval required between a dive to 18 Metres 60 feet?

First dive: 18 metres/60 feet for 15 minutes; surface interval: 1:00.

## What is minimum surface interval?

Surface Interval Time (SIT) must be at least 10 minutes between dives. If your SIT is less than 10 minutes, you must consider your second dive as a continuation of the first dive. NAUI recommends a SIT of at least one hour between dives.

## When should you not scuba dive?

If you’re generally fit and healthy, there should be no problem. You will be required to sign a medical statement before learning to dive. If you’re already certified to dive, avoid diving if you’re not feeling one hundred percent. In particular, don’t dive if you’ve got a head cold or a hangover.