2013 of a Request For Proposal (RFP) for four more LPDs, rather than a new class of vessel, to be constructed. In November 2020 the scope of the RFP was reduced to two ships before the project was eventually cancelled before construction commenced. In August 2021 the IN published a new RFI for four LHDs, with the first vessel expected to enter service no earlier than 2025. While these ships are technically LHDs they are a multi-role vessel that will undertake a similar range of duties as a JSS including: transport and land ashore a combined arms force stow onboard and discharge combat cargo required for undertaking and sustaining the operations ashore enable operation of multiple means of ship to shore movement of troops and cargo act as Command Centre for the Commander, Amphibious Task Force, Landing Force Commander and the Air Force Commander act as mother ship for unmanned vehicles/ platforms/ equipment provide medical facilities for treatment of battle casualties undertake humanitarian assistance and disaster relief missions. Royal Malaysian Navy In September 2021 the Malaysian Minister of Defence announced that his country's government would procure two a multi-role support ships (MRSS), vessels very similar in specification to a JSS, for the Royal Malaysian Navy (RMN). The vessels would enhance the RMN's strategic sealift capabilities between Peninsular Malaysia and the East Malaysian states of Sabah and Sarawak on the island of Borneo. The nature of the MRSS requirements leads towards a smaller version of existing amphibious assault vessels currently available from multiple international shipbuilders, including the French and the Chinese Type 075 landing helicopter docks (LHDs), and Dutch Enforcer-class and Indonesian landing platform docks (LPDs). Navantia Australia proposed that their design for the RAN's JSS could fulfil this role, but the proposed vessel was not included in the list of designs being considered. The procurement of these vessels is expected to commence in 2024. United States Navy The USN operates the world's largest fleet of amphibious assault vessels (AAV) with a number of different classes of ships of various sizes and capabilities that can fulfil a wide range of roles. Of particular relevance to the subject of joint supply ships are the amphibious command ship (ACS) and the LPD. Blue Ridge-class ACS The Blue Ridge-class ACS are the USN's and worlds's first and only amphibious command ship, brought about due to previous command ships having insufficient speed to keep up