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International Lieutenants Course
Online courses / warfare officer

International Lieutenants Course

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Key information


An intermediate course designed to build-on the Navigation and Warfare skill set of Junior Warfare Officers with some previous experience at sea and which will provide a basis for more specialised navigation and/or warfare training.

Course details

  • Action Information Organisation
  • Relative and ASW Velocity
  • Electronic Warfare
  • Maritime Tactical Estimate
  • Principles of Anti Submarine Warfare
  • Principles of Surface Warfare
  • Principles of Anti Air Warfare
  • Surface Picture Compilation
  • Air Picture Compilation
  • Anti Submarine Warfare Picture Compilation
  • AAW/Surface/ASW voice procedures
  • Helo & Fixed wing aircraft in SW & ASW
  • Basic Met & Oceanography
  • International Maritime Law
  • Warfare simulator, single threat practical exercises in Anti-Surface Warfare (ASuW), Anti-Submarine Warfare (ASW), & Anti-Air Warfare (AAW)
  • Close Range theory and drills
  • Electronic Chart Display & Information System (ECDIS)

Navigation Modules:

  • Rule of the Road
  • Tides and Time Zones
  • Communications Management Module to include:
  1. Tactical Communications
  2. Stationing
  3. Forming & Screening
  • RAS & Fleetwork consolidation
  • Charts
  • Chartwork
  • Coastal Navigation
  • Pilotage
  • Bridge Simulator
  • Communications SRC
  • Practical Navigation at sea conducting Ship Handling and Practical Pilotage


  • To have completed the RN Initial Naval Training (Officer), or National equivalent, ideally ISL
  • Candidates must have at least 500 hours of certified seagoing Bridge Watchkeeping experience
  • Eyesight standards are detailed at the front of the chapter

Qualifications gained

Practical assessment in Navigation and Pilotage conducted in a suitable vessel plus continuous assessment and final examination to RN standard in:

  • Relative Velocity
  • AIO
  • Warfare
  • Communications
  • Bridge Simulator
  • Rule of the Road
  • Sea Phase
  • Chart Assessment
  • Final Warfare & General Navigation Exam
  • IMO/STCW95 ECDIS Certification

Successful students will be awarded with a Pass, Pass with Merit, or Pass with Distinction. GMDSS ‘VHF Short Range’ certificate (will require own nation’s endorsement).

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