EntityQ5633239· pop 5· linked from 7 articlesHMS M4Sign in to save1919 M-class submarineConnectionsM-class submarineEntityLondonCityInternational Standard Book NumberEntitysubmarineEntityNewcastle upon TyneEntitytorpedoEntityknotEntityOCLC, Inc.EntityRoyal NavyEntityHarperCollinsEntitytorpedo tubeEntitylong tonEntityArmstrong WhitworthEntityanti-aircraft warfareEntityR-class submarineEntityHMS M1EntityHMS M3EntityHMS M2EntityL-class submarineEntitylist of submarines of the Royal NavyEntityCategories1919 shipsBritish M-class submarinesShip infoboxes without an imageShips built by Armstrong WhitworthWorld War I submarines of the United Kingdom