Hi Ted. Wikipedia data additional to RAN site info
"The LHDs will transport 1,046 soldiers and their equipment.[8] Adelaide will be capable deploying a reinforced company of up to 220 soldiers at a time by airlift.[4] Two vehicle decks (one for light vehicles, the other for heavy vehicles and tanks) have areas of 1,880 square metres (20,200 sq ft) and 1,410 square metres (15,200 sq ft) respectively, and between them can accommodate up to 110 vehicles.[5] The well deck will carry up to four LHD Landing Craft, which can be launched and recovered in conditions up to Sea State 4.[5][6] The flight deck can operate six MRH-90-size helicopters or four Chinook-size helicopters simultaneously, in conditions up to Sea State 5.[7] A mix of MRH-90 transport helicopters and S-70B Seahawk anti-submarine helicopters will be carried: up to eight can be stored in the hangar deck, and the light vehicle deck can be repurposed to fit another ten.[5][9] The ski-jump ramp of Juan Carlos I has been retained for the RAN ships, although fixed-wing flight operations are not planned for the ships.[8][10]

G'Day Capt,

She is classed as a Landing Helicopter Dock vessel. Normally carries 4 x landing craft in the floodable rear dock as well as helicopters in the hangars and on the flightdeck.

Cheers,
tropic

Why she is classified as landing ship ?

HMAS ADELAIDE L01
Namesake: City of Adelaide
Builder: Navantia, Ferrol, Spain and BAE Systems Australia, Williamstown, Victoria
Laid down: 18 February 2011
Launched: 4 July 2012
Commissioned: 4 December 2015
Homeport: Fleet Base East
Motto: United for the common good
Honours and awards: Battle honours: four inherited battle honours
Status: Active
General characteristics
Class and type: Canberra - class Landing Helicopter Dock
Displacement: 27,500 tonnes (30,300 short tons; 27,100 long tons) at full load
Length: 230.82 m (757.3 ft)
Beam: 32.0 m (105.0 ft)
Draft: 7.08 m (23.2 ft)
Propulsion:
Combined Diesel and Gas
1 × GE LM2500 gas turbine
2 × Navantia MAN 16V32/40 diesel generators
2 × Navantia Siemens azimuth thrusters
Speed:
Over 20 knots (37 km/h; 23 mph) maximum
19 knots (35 km/h; 22 mph) full-load sustained
15 knots (28 km/h; 17 mph) economical
Range: 9,000 nautical miles (17,000 km; 10,000 mi) at 15 knots (28 km/h; 17 mph)
Boats and landing craft carried:
4 × LLC
Capacity:
Up to 110 vehicles
Heavy vehicle deck: 1,410 m2 (15,200 sq ft)
Light vehicle deck: 1,880 m2 (20,200 sq ft)
Troops: 1,046
Complement: 358 personnel; 293 RAN, 62 Australian Army, 3 RAAF
Sensors and processing systems:
Giraffe AMB radar, Saab 9LV combat system
Electronic warfare and decoys:
AN/SLQ-25 Nixie towed torpedo decoy
Nulka missile decoy
Armament:
4 × Rafael Typhoon 25 mms remote weapons systems
6 × 12.7 mms machine guns
Aircraft carried:
8 helicopters (standard)
18 helicopters (maximum hangar space)
Aviation facilities: Flight deck with 13 degree ski-jump, 6 in-line deck landing spots.