I would like to introduce you to an experienced freelance maritime researcher who I have used for my own research.
His research covers:-
Civilian mariners in British service (mercantile, whaling, fishing & pilotage): c.1835 to c.1972
Royal Navy and Royal Marines: c.1793 to c.1945
All the R.N.’s and R.M.’s Reserves from the R.N.R. and R.N.V.R. and Coastguard to the decidedly esoteric: as appropriate
British Mariners in India, both the United East India Company (Maritime Service and ‘Bombay Marine’); and subsequently the multifarious organisations in armed service during the Raj period from H.M. Indian Navy to the Royal Indian Navy and their Reserves: c.1760 to 1947 as appropriate.
His website guides and academic papers are now at http://www.barnettmaritime.co.uk.
You can email him at firstname.lastname@example.org