Thanks for the info, Alistair - looks like one to defer for the moment.
Am I alone in finding it somewhat frustrating not having a nautical bookshop next door? So much ordered "sight unseen" can be disappointing.
Here in Milton Keynes - about as far from the sea as one can get in the UK - the local bookshops (all parts of big chains) only ever seem to have two books on commercial shipping - and they are both about the Titanic.
Still have fond memories of the late-lamented John Smith and Porteous bookshops in Glasgow.
Regards
David