roll-on / roll-off ships (Ro-Ro)

roll-control / roll control

nation contributing ships

serviceability of ships

ships taken up from trade (STUFT)

formation of troops / ships etc.

cruising disposition of ships in an amphibious group

Space System for Tracking Ships and Aircraft in Distress – Search and Rescue Satellite (COSPAS-SARSAT)

approaching ships safe pilotage

crewless drone attack against enemy ships

off-route (off route)

off-design / off design

lift-off / lift off

on-off keying; on/off keying (OOK)

guerrilla-roll

muster roll

roll motion

roll of honour

roll up

roll up enemy lines

roll up the hostile flanks

roll-fed waterproof paper

roll mat

sleeping mat, roll mat

tank passive pitch and roll damping system

camber roll

crash roll

front roll rate

roll damper

roll control

roll program

roll programmer

roll angle