https://irpcs.app/blog/ Practical guides to the COLREGS, IALA buoyage, lights and shapes, and maritime exam prep. en-gb Wed, 10 Jun 2026 21:25:17 GMT https://irpcs.app/blog/sound-signals-cheat-sheet/ https://irpcs.app/blog/sound-signals-cheat-sheet/ Wed, 10 Jun 2026 17:59:01 GMT From one short blast to five, here is what COLREGS Rules 34 and 35 actually require - and where US Inland rules catch skippers out. Sound signals COLREGS rules Rule 34 Fog signals Exam prep https://irpcs.app/blog/rule-12-sailing-vessels/ https://irpcs.app/blog/rule-12-sailing-vessels/ Wed, 10 Jun 2026 17:48:12 GMT Port tack, starboard tack, windward boat - Rule 12 ranks them all. Here's how to apply the hierarchy confidently at sea and in exams. COLREGS rules Sailing vessels Exam prep Seamanship Navigation lights https://irpcs.app/blog/stand-on-vs-give-way/ https://irpcs.app/blog/stand-on-vs-give-way/ Wed, 10 Jun 2026 12:57:32 GMT Rule 16 and Rule 17 explained clearly - including the moment a stand-on vessel must stop standing on and take action. COLREGS rules Collision avoidance Exam prep Seamanship Rule of the road https://irpcs.app/blog/rule-5-look-out/ https://irpcs.app/blog/rule-5-look-out/ Tue, 09 Jun 2026 12:12:39 GMT Every COLREGS incident report seems to cite Rule 5. What "a proper look-out by sight and hearing" actually demands, why it applies even at anchor watch, and how examiners test it. COLREGS rules Exam prep Seamanship https://irpcs.app/blog/iala-buoyage-regions-a-and-b/ https://irpcs.app/blog/iala-buoyage-regions-a-and-b/ Tue, 02 Jun 2026 12:12:39 GMT Lateral marks swap colours between IALA Region A and Region B - cardinal, safe water, isolated danger and special marks do not. Here is the difference that matters, and how to keep it straight. Buoyage IALA Navigation