First British person to enter Underwater Orienteering Event

Well this weekend sees the UK's debut in Underwater Orienteering. I am going to the Spreepokal, which is run by a Club near Berlin. No-one seems to remember the last time anyone entered such an event, although the sport used to be popular in the 70's. Anyway if you look on the CMAS website I am the only person in the UK with a competitor licence.
Ive no idea how I will do - but I expect I will learn heaps.

which way is North.......oh yes the pointy end