Blogger Rides A Brit SSN

[Intel Source: Chapomatic, via Neptunus Lex] Freelance British journalist Blackrat recently took a ride aboard HMS Trenchant, and blogs about it. Lots of good pictures! One thing I couldn't figure out, though: What system of measurement are they using on the rudder markings? They're too big to be centimeters -- I'm guessing decimeters; it looks like there are about 20 of them in about six feet, which is about right. Anyone know for sure?

Going deep...