I used to help Merchant Navy cadets prepare for their oral exams at what used to becalled 2nd Mates level. When facing the examiner they could fail for having a word out of place. The RYA demands a full working knowledge from their Yachtmaster candidates. Anybody who complains about fishermen's lack of IRPCS knowledge usually gets nowhere. Why the different standards? And what standard do you expect of your fellow mariners?