RMS stands for Royal Mail Ship ... So Canadian naval vessels bear the prefix HMCS, for His/Her Majesty's Canadian Ship, while the Jamaican naval force uses His/Her Majesty's Jamaican Ship ...

RMS, as in RMS Titanic ... “HMS” is the Royal Navy for His or Her Majesty’s Ship. “SSN” is a nuclear-powered submarine. “CS” means cable ship.

Scot James Haldane helped build the RMS Lusitania - and was onboard when it went down after being torpedoed by a German submarine claiming the ...