IRPCS vs GoAstern Games

IRPCS is a focused training app for learning, revising and practising the International Regulations for Preventing Collisions at Sea, commonly known as IRPCS or COLREGS. Built for skippers, SAR crew, lifeboat crews, maritime students, professional mariners and everyday boaters, IRPCS helps turn complex collision regulations into practical knowledge you can understand, remember and apply on the water. Whether you are preparing for an RYA, MCA or STCW assessment, supporting Search and Rescue training, refreshing your knowledge before going afloat, or improving your confidence with collision avoidance, IRPCS gives you a clear and structured way to study the rules that keep vessels safe at sea. The app covers all IRPCS/COLREGS rules, combining the official rule text with plain-English explanations, from experienced professionals. This helps you move beyond memorising wording and understand what each rule means in real situations, including who gives way, what action to take, how vessels should behave in restricted visibility, and how lights, shapes and sound signals are used. IRPCS is designed for regular practice. Use bite-sized lessons, adaptive quizzes and realistic maritime scenarios to build confidence step by step. Track your progress, identify weak areas and return to the topics that need more work. Key features include: • All IRPCS/COLREGS rules in one place • Official rule text with clear plain-English explanations • Adaptive quizzes to help identify weak areas • Realistic collision avoidance scenarios • Lights, shapes and sound signal practice • Progress tracking to monitor improvement • Offline access for use while travelling or at sea • Useful for SAR, lifeboat, commercial and leisure users • Suitable for beginners, trainees and experienced mariners IRPCS is useful for: • RYA Day Skipper, Coastal Skipper and Yachtmaster preparation • MCA and STCW maritime training • Search and Rescue crew development • Lifeboat crew training and revision • Commercial vessel operators • Sailing, motor boating and powerboat users • Harbour, inshore and coastal navigation • Refreshing knowledge before going afloat From steering and sailing rules to responsibilities between vessels, navigation lights, day shapes, sound signals, conduct in restricted visibility and actions to avoid collision, IRPCS helps you practise the knowledge that matters at sea. Learn the rules. Test your understanding. Build confidence. Stay safer on the water. Download IRPCS and start improving your COLREGS knowledge today. Subscription terms: IRPCS may offer auto-renewing subscriptions that provide access to premium learning, revision and practice features. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://irpcs.app/privacy IRPCS Terms: https://irpcs.app/terms

Drill the seamanship skills every sailor is supposed to know — and most of us forget between certificates. Built for RYA Day Skipper and Yachtmaster candidates, Sea Cadets, and anyone who wants the basics back at their fingertips before the next passage. WHAT'S INSIDE Visual & audio signals • Morse code — ITU letters and digits, audio playback at 5–20 WPM, screen-flash and Aldis-lamp torch mode, microphone-based live decode • Semaphore — 8-position arm code, A–Z plus the J-prefix numerals • ICS maritime flags — letter flags and numeric pennants, full operational meanings (Oscar = man overboard, NC = distress, AB = need a tug urgently) • NATO phonetic — A–Z plus 0–9 with audio review and confusion drills Watch-keeping • Nav lights — fourteen vessel types × four aspects (head-on, stern, both beams), fog-signal audio playback, Rule 21 arcs-of-visibility diagram • Day shapes — IRPCS Rules 24–30 black-silhouette signals • IALA buoyage — cardinal, lateral, isolated-danger, safe-water, special, and emergency-wreck marks. Region A / B switch • IRPCS — twenty animated give-way scenarios covering Rules 9–18 Navigation • Chartwork — DR / EP / CTS, water and ground vectors, tidal triangles, fix and waypoint symbols • Tides — heights diagram, rule of twelfths and sinusoidal calculators, secondary-port corrections, time-at-height with a live tidal curve • Pilotage — transits, leading lines, danger bearings with a live NLT/NMT calculator, harbour-entry pre-flight, IPTS port traffic signals • GPS literacy — datums, COG/SOG/CTS, DOP, eight failure modes and how to spot them Safety • Mayday + DSC — interactive script builder for the Channel 16 voice call • Distress signals — IRPCS Annex IV non-flag signals (flares, EPIRB, SART, dye, arms-wave) • MOB recovery — six animated manoeuvres (figure-eight, beam-reach return, Williamson, Anderson, Scharnow, quick-stop) • Pre-departure check — 44-item interactive checklist with progress saved across sessions Seamanship • Knots — the eight RYA knots with step-by-step tying • Anchoring — anchor types, holding ground, scope, kedge use cases, setting and weighing procedure • Met Office weather — shipping-forecast terminology, forward and reverse drills HOW YOU USE IT Three areas: Games, Drills, and Reference. Games — flashcards with spaced repetition, beat-the-clock timed rounds, a mixed-exam mode that draws from every module, and Soundings — a battleships × minesweeper hybrid where you hunt a hidden fleet using IALA cardinal-mark clues. Two-player Bluetooth Hangman and Soundings for paired phones in range. Drills — procedural exercises with no scoring. Run through the MOB manoeuvres or work the pre-departure checklist before each passage. Reference — single-page lookup for every catalogue in the app. Pull it up at the chart table when you need to remember what a flag means at a glance. An in-game reference drawer opens with one tap from any game so you can check without losing your place. PRIVACY Progress and entitlement data are stored locally on the device. Sign-in is optional and uses a passwordless magic-link, Apple, or Google. No tracking, no ads.