Boater 103: Celestial as a Backup to GPS

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Providers 1
Upcoming dates 2
From $595
WHAT IS THIS COURSE?

Course Overview

Boater 103 teaches celestial navigation as GPS backup using stars, sun, and moon for long-distance cruising.

Prerequisites

  • Boater 101-102 knowledge
  • Basic maths
  • Navigation interest

What You'll Learn

  • Celestial principles
  • Sight reduction
  • Sextant use
  • Altitude corrections
  • Position fixing
  • Navigation tables
COURSE AT A GLANCE

Key Facts

Duration
15-20 hours
Typical Cost
$595
Issuing Body
Maritime Institute
Certificate
Boater 103 Certificate
UPCOMING DATES

Available Course Dates

Date School Location Price
6 Jul 2026 – 11 Jul 2026 Maritime Institute (Training Resources Maritime Institute / TRLMI) San Diego, United States $595 Book →
6 Jul 2026 – 10 Jul 2026 Maritime Institute (Training Resources Maritime Institute / TRLMI) San Diego, United States $595 Book →
WHERE TO STUDY

Schools Offering This Course

Maritime Institute (Training Resources Maritime Institute / TRLMI)
San Diego, United States
View school →
Important: Course dates, availability and prices shown are indicative only and were gathered from providers' public websites. Always confirm current dates, availability and pricing directly with the training provider before booking. All bookings are made directly with the provider — YachtSync is not a party to any booking. Course information is for guidance only.