Divers use logbooks to record important information about their dives.
Your dive log is the record of your diving experience. It serves as a verification of your dives and a compilation of your diving memories. You can purchase dive log pages that fit in logbooks and have a template for recording the dive. They vary in their layout and level of detail, but all have space for the essential information about the dive. You can always choose to record more information because, ultimately, the dive log is yours.
Instructions
Before the Dive
1. Record the date of your dive. This helps you keep track of the frequency of your dives. Also, some dive masters will ask you to see your log book before you can dive off of their boats. They want to see that you have been in the water recently, so having the date is essential.
2. Make a note of the dive site. Sometimes, you will dive at a named location, and you can write the name. If you are diving at an unnamed site, you can make up your own name for it. You can write down directions or coordinates to ensure that you can find the site again.
3. Write down the conditions at the site. Indicate whether it is a boat or shore dive and whether it is in saltwater or freshwater. Record the water temperature and the weather conditions.
4. List the equipment that you are using. Important information in this section includes the thickness of your wetsuit, how much weight you are carrying, and the size and material of your tank.
5. Write the starting air pressure in your tank.
After the Dive
6. Record your maximum depth.
7. Record your bottom time. This is the time between your entry into the water and the start of your direct ascent to the surface.
8. Write down the ending air pressure in your tank. Using the difference in starting and ending pressures and the depth at which you dove, you can calculate your surface air consumption. Keeping track of your air consumption allows you to anticipate how much air you will need to take on future dives.
9. Write a narrative of your dive. This part of the log plays the biggest part in helping you recall the dive when you look at your log later on. You can record your general dive plan, things that you saw on the dive, your impressions of the site or even its history.
10. Make any additional notes. If you would have been more comfortable with adjustments to your gear, write that down so that you will remember to make the change the next time that you dive in similar conditions.
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