Watchkeeper’s Handbook September 2025 (version 12 upd. Jan 2026)

Mileage / Speed Ready Reckoner 2.5 – 10.0 knots

Mileage / Speed Ready Reckoner 10.5 – 20 knots

Tide and Wind drift calculator

Opening the Lookout checklist

Closing the Lookout checklist

PQ Tidal Streams worksheet

NOTE if there is something you would like to see added to this page please contact us.