Advanced Seatime Calculator

Accurately track and calculate your maritime service periods for certification applications. Record vessel details, voyage information, and generate comprehensive seatime reports.

maritime service • sea days calculation • certification tracking • seafarer records

Calculate Seatime

Vessel Information
Service Details

Voyage Log

Add your calculated seatime to your voyage log to keep track of your sea service.
Vessel Name Rank Period Duration Actions
Total Seatime: 0 days

Service Reports

Generate reports of your sea service for certification applications.
Report Options

About This Tool

Features
  • Accurate seatime calculation
  • Voyage logging and tracking
  • Certification requirements
  • Service report generation
  • Leave period adjustments
Calculation Method

This calculator uses the UK Maritime and Coastguard Agency (MCA) method to calculate seatime:

  • Full days between joining and leaving dates
  • Adjustments for leave periods
  • Compliant with STCW requirements
  • Results valid for certification applications
Pro Tip: Keep your discharge book entries and certificates handy when using this calculator for the most accurate results.