DMS Maritime, formerly Defence Maritime Services, is a company providing port services to the Australian Defence Force and Marine Unit. It is a subsidiary of Serco. History Defence Maritime Services was founded in 1997 as a 50:50 joint venture between P&O Maritime Services and Serco to fulfill a contract to organise tug boats and ferries and supply and maintain small boats for the Royal Australian Navy (RAN). In 2012, Serco bought out P&O's shareholding. Headquartered in Sydney, it has operations in Cairns, Darwin, Dampier, Fremantle, Western Port, Jervis Bay and Sydney. It currently operates eight oceangoing vessels and over 100 harbour craft and has around 350 staff. The services DMS is contracted to provide to the RAN include operating tug boats and lighters at RAN bases, training members of the RAN, and maintaining RAN warships. Vessels operated Auxiliaries General-purpose tenders Seahorse Spirit Seahorse Standard Both Vessels have been Retired and removed from DMS Service. Submarine rescue and escape ships Yard and service craft 60-ton flat-top lighters FTL 60101 FTL 60102 FTL 60103 FTL 60104 FTL 60105 FTL 60107 FTL 60108 FTL 60109 FTL 60110 FTL 60111 FTL 60112 FTL 60113 FTL 60114 FTL 60115 FTL 60116 FTL 60117 FTL 60118 FTL 60119 FTL 60120 FTL 60121 Southerly 65 class diving tenders 2001 Dugong 2003 Seal 2004 Shark Miscellaneous concrete ammunition lighters CAL 209 CAL 5012 CAL 10011 CAL 10012 CAL 10013 CAL 10014 Wattle class crane stores lighters CSL 01 Wattle CSL 02 Boronia CSL 03 Telopea Steber 43 naval general purpose workboats NGPWB 01 Patonga NGPWB 02 NGPWB 03 NGPWB 04 Sea Dragon NGPWB 05 NGPWB 06 NGPWB 07 NGPWB 08 NGPWB 09 Sea Witch NGPWB 10 Noosacat 930 harbour personnel boats 0901 0902 0903 0904 Riviera class VIP launch 38103 Admiral Hudson Admiral's barge AB 1201 Green Parrot Shark Cat 800 harbour personnel boats 0801 0802 0803 0805 Naval work boats NWB 1230 NWB 1260 NWB 1281 Otter NWB 1282 Walrus NWB 1285 Grampus NWB 1286 Dolphin NWB 1287 NWB 1288 NWB 1289 NWB 1290 NWB 1291 NWB 1292 Turtle Halvorsen-design workboat AWB 4011 40-foot Mk 1 and 1963-design workboats AWB 404 AWB 421 AWB 423 AWB 424 AWB 436 AWB 440 AWB 1658 AWB 4006 AWB 4007 AWB Mod. II workboat 4010 AWB short and long group cabin workboats Amethyst 4002 7.2 metre rigid-hulled inflatable boats 27 RHIBS, numbered 0701 through 0727 Radio controlled surface targets RCST