Landing Craft Tank (Rocket)
The Landing Craft Tank (Rocket) or LCT(R) was developed from the British Mk.2 and Mk.3 Landing Craft Tank (LCT) during the Second World War. It was designed to saturate beaches with either 972 or 1,044 rockets prior to the landing of troops.
Source: Wikipedia — Landing Craft Tank (Rocket) (CC BY-SA 4.0)