How to Use the JtB Dive LogBook — A Diver’s Guide

How to Use the JtB Dive LogBook — A Diver’s Guide

Overview

The JtB Dive LogBook is a structured logbook for recording dive details, gear, and observations so you can track progress, spot patterns, and preserve memories.

Pre-dive setup

1. Record dive number & date — sequential numbering helps tracking.
2. Location & site — note GPS or site name and nearest landmark.
3. Buddy & boat — list dive buddy, dive leader, and vessel (if any).
4. Plan & objectives — depth/time limits, type (shore/boat/night), goals (training/photo).
5. Equipment checklist — suit, BCD, cylinder, regulator, weights, computer, lights, camera; note cylinder start pressure and gas mix.

During the dive

1. Start/End times — log entry and exit times to compute bottom time.
2. Maximum depth & average depth — taken from your computer or depth gauge.
3. Gas consumption — start and end pressures; calculate rate (bar/min) if desired.
4. Conditions — note visibility, current, water temp, swell, and surge.
5. Navigation & route — brief note or sketch of path, compass headings, and notable features.

Post-dive entries

1. Surface interval & next dive plan — record time on surface and plan for subsequent dives.
2. Safety checks — any decompression stops, warnings from computer, or unusual events.
3. Physical condition — how you felt (narcosis, ear issues, fatigue).
4. Problems & actions — equipment malfunctions, gas issues, close-calls, and how they were resolved.
5. Skills practiced & training — skills drilled, instructor notes, and certification steps.

Observations & extras

• Marine life & photo notes — species seen, behaviors, and timestamps for photos/videos.
• Weather & shore conditions — helpful for planning returns.
• Personal notes — memories, feelings, tips for next time.

Template (concise)

• Dive #:
• Date:
• Site/GPS:
• Buddy/Boat:
• Plan/Objectives:
• Start/End Time:
• Bottom Time:
• Max Depth / Avg Depth:
• Start/End Pressure (gas mix):
• Visibility / Current / Temp:
• Problems / Actions:
• Marine Life / Photos:
• Instructor / Notes:

Best practices

• Fill entries immediately after surfacing while details are fresh.
• Use consistent units (meters/feet, bar/psi).
• Keep both digital backup and a paper copy for certification or gear warranty records.
• Review past logs monthly to identify weaknesses and set training goals.

Quick checklist before signing off

• Date, dive number, times, depths, gas data, buddy, site, and any incidents recorded.
• Sign or initial the entry if needed for certification.

If you want, I can convert this into a printable one-page template or a fillable digital form.