Living Document Notice
Staged 2026-09-28. Living revisions and interconnected notes live in the Bosun PKM Garden.

Pilot Charts, Ocean Routing Legs, and Current Atlases

Planning offshore passage routes and multi-week ocean legs requires analyzing historical pilot charts, prevailing wind roses, surface current atlases, and tropical storm statistics. Wayfinder catalogs oceanographic routing data.

Routing Invariants

  • Prevailing Wind and Current Frequencies: Pilot chart probability matrices identify optimum seasonal sailing corridors and avoid storm zones.
  • Great Circle and Rhumb Line Leg Splits: Waypoint routing splits long ocean passages into manageable rhumb line and great circle legs.
  • Climatological Risk Sinks: Historical gale and hurricane frequency maps integrate directly into voyage risk assessment registers.

Comprehensive ocean routing legs and pilot chart analyses ensure safer, faster offshore passages.


  • Directus Target: wayfinder-blog
  • Garden Source Reference: MOC - Wayfinder Navigation Engine, MOC - Fleet Operations, GLS-1002 - Tidal Current Forecasting