Compliance-Focused Design
USCG & IMO Logbook Requirements
Mariner's Log is designed to help you meet or exceed US Coast Guard and International Maritime Organization requirements for official vessel logbooks. Here's how our features align with regulatory standards.
Voyage Documentation
- Date and time of departure and arrival
- Port or place of departure and destination
- Course steered and distance traveled
- Compass deviation observations
- Weather and sea conditions during the voyage
Position & Navigation
- GPS coordinates at regular intervals
- Position fixes and navigational observations
- Changes in course or speed with reasons
- Passing of significant waypoints or landmarks
- Anchoring positions and times
Watch & Crew Records
- Watch changes and personnel on duty
- Crew manifest and passenger count
- Drills conducted (fire, abandon ship, man overboard)
- Safety equipment checks and inspections
- Crew medical issues or incidents
Operational Events
- Engine start/stop times and hours
- Fuel consumption and bunkering operations
- Cargo operations and loading/unloading
- Equipment malfunctions or repairs
- Any unusual occurrences or incidents
Safety & Compliance
- Pollution prevention measures
- Waste disposal records
- Communications log (distress calls, traffic)
- Vessel inspections by authorities
- Documentation of regulatory compliance
Record Keeping Standards
- Entries made in chronological order
- No erasures - corrections must be lined through
- Entries signed by officer of the watch
- Permanent, tamper-evident record keeping
- Retention for minimum required period (varies by vessel type)
Disclaimer: Mariner's Log is designed to assist with logbook documentation but does not guarantee regulatory compliance. Requirements vary by vessel type, size, and jurisdiction. Always consult with the appropriate maritime authority for your specific compliance obligations.