Thanks again, tatters - I enjoyed this one very much, it's a real novelty! I'm wondering where the def is for one of the thematic elements... but that might fall with a bit more research.
I got a full grid but a couple that I can't parse. Having the usual trouble finding all the missing words. My knowledge of this mariner is severely restricted and the four pertinent words are not exactly leaping out at me. Why can't they stick to sport?