Compass Global is independent and is not affiliated with or endorsed by IMO, IHO, IALA, World Sailing, or any national authority. It does not award certification.

Compass Global

Compass Global study companion

Electronic Navigation, GPS, and AIS Study Companion

Direct answer

GPS, electronic charts, routes, AIS, CPA/TCPA, alarms, cross-checking, and degraded-navigation decisions for boat owners and charterers. Compass provides independent knowledge preparation only. It does not administer an official examination, award certification, demonstrate practical competence, or replace current instructions from an authorized provider or authority. Fictional displays are teaching models and not approved navigation systems or navigational charts.

Price
£29.99 once
Course size
10 modules
Access
Lifetime access
Format
Independent online study companion
Preview the free module

Product tour

Try the revision loop here

This is a working, course-specific sample. Read one rule, answer a real-style question, flip a recall card, and see how the next action is chosen.

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Sensor agreement and safety settings

One rule, explained clearly

An electronic display combines information with different origins, update rates, datums, accuracies, and failure modes. Before relying on a route, confirm the chart edition and updates, safety contour, position source, heading source, offsets, and alarm settings. Cross-check the display against radar, depth, visual marks, and the vessel's observed movement.

Course route

Learn the knowledge, then take it afloat with an instructor

1Free

Sensor and Position Foundations

Position sources, antenna location, heading, speed, depth, wind, timestamps, networks, and the difference between a value, its source, and its display.

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2Full access

Chart Datums, ENCs, and Update Status

Horizontal and vertical datums, official ENCs, vector layers, raster images, scale, compilation, update status, permits, and display-category choices.

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3Full access

GNSS Limitations and Integrity

Satellite geometry, antenna environment, interference, jamming, spoofing, multipath, receiver status, accuracy versus integrity, and independent position checks.

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4Full access

Heading, Course, Track, and Speed

Heading, course to steer, course over ground, track, speed through water, speed over ground, set, drift, leeway, and vector relationships.

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5Full access

Waypoints, Routes, and Cross-Track Error

Waypoint placement, route legs, arrival circles, turn anticipation, cross-track error, along-track distance, corridor checks, and avoiding waypoint fixation.

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6Full access

Safety Contours and Route Checks

Safety depth, safety contour, shallow and deep contours, vessel draft, tide, squat, waves, confidence, alarm limits, and manual route inspection.

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7Full access

AIS Targets, CPA, and TCPA

AIS reports, dynamic and static data, update rates, target vectors, CPA/TCPA calculations, target association, carriage limits, and collision-avoidance boundaries.

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8Full access

Alarms and Human Factors

Alarm configuration, acknowledgement, prioritization, nuisance alarms, mode awareness, confirmation bias, workload, fatigue, handovers, and shared mental models.

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9Full access

Radar, AIS, Chart, and Visual Cross-Checks

Independent and common-mode evidence, radar ranges and bearings, AIS association, visual identification, depth contours, charted objects, and resolving disagreement.

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10Full access

Degraded and Lost Electronics

Power loss, display failure, corrupt routes, GNSS denial, sensor faults, paper and offline backups, DR, communications, crew roles, and recovery without compounding the failure.

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What the companion includes

Clear knowledge and practical boundaries

  • Original lessons and explanations
  • At least 18 explained questions and 12 flashcards per module
  • Three 40-question mixed knowledge assessments
  • Worldwide terminology, jurisdiction, and primary-source context
  • Practical-awareness prompts clearly separated from assessed knowledge

Not included

  • A national licence, certificate, endorsement, or official examination
  • National inland rules, prescriptions, notices, or sailing instructions
  • Copied rulebook, chart, assessment, or official diagram content
  • A substitute for lookout, seamanship, or current local information
  • A guarantee of acceptance by an authority, club, school, or operator

Editorial record

Primary-source review

International principles are reviewed against current primary sources. National law, prescriptions, sailing instructions, equipment requirements, and local notices must be checked separately.