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Republic of Korea Navy - ROKN
Dokdo class Amphibious Assault Ship
Landing Platform Helicopter - LPH

dokdo class landing platform helicopter roks marado lph-6111 6112 amphibious assault ship korean navy rokn 05x hanjin hhi
ROKS Dokdo (2007)
ROKS Marado (2021)
14300 tons (empty) / 19500 tons (full load)
199 meters (652 feet 11 inches)
Beam: 31 meters (101 ft 8 in)
Draft: 7 meters (23 ft)
Speed: 23 knots (43 km/h), max. / 18 knots (33 km/h), cruise
Range: 10000 NMI (18500 km) at cruise speed
Complement: 330 (ship)

AD (Combined Diesel and Diesel)
4 x
SEMT Pielstick 16 PC2.5 STC marine diesel engines (24 MW / 32000 shp) in total
2 shafts, 2 controllable pitch propellers
2 x Goalkeeper CIWS
1 x Mk.31 GMLS for RIM-116 Rolling Airframe Missiles (RAM)

1 x
4-cell K-VLS for 16 x K-SAAM Sea Bow missiles

2 x Mk.15 Phalanx CIWS
flight deck with 5 landing spots and hangar deck for up to 15 helicopters

Boats & landing craft: 2 x Solgae class LCAC (LSF-II)
Capacity: up to 200 vehicles (including tanks)
Troops: 720 marines
Thales SMART-L long-range active electronically scanned array (AESA) radar (L-band)
Thales MW08 passive electronically scanned array target indication 3D radar (G-band)
AN/SPS-95K navigation radar
tactical air navigation system (TACAN)
Safran VAMPIR-MB optronic sight
SLQ-200(v)5K SONATA ESM/ECM system
chaff/decoy launching system

IAI/Elta EL/M-2248 MF-STAR multifunction active electronically scanned array (AESA) radar
LIG Nex1 SPS-550K medium-range air and surface surveillance multibeam active electronically scanned array 3D radar
AN/SPS-95K navigation radar
tactical air navigation system (TACAN)
SAQ-600K infrared search and track system (IRST)
SLQ-200(v)5K SONATA ESM/ECM system
K-Dagaie NG decoy launching systems

The LPX is an amphibious warfare ship which includes a well deck to accommodate amphibious assault vehicles (AAVs) and two LCAC, the first of which (LSF 631) was acquired in April 2007. The ship is 199 metres (652 ft 11 in) long, 31 metres (101 ft 8 in) wide, with a 14,000-ton (empty), or 18,000-ton (full) displacement and was built incorporating stealth technologies. It has been said to be one of the most advanced vessels in the Asian Pacific.

As a high-speed amphibious ship, the LPX was based on the concept of "over-the-horizon assault." As the name indicates, the "over-the-horizon assault" comprises a military operation in which an amphibious landing is conducted with high-speed air-cushioned vehicles and helicopters from beyond the horizon, where they cannot be easily detected or attacked by the enemy. The conventional landing ship tank (LST) has to approach the coastline for landing, at the risk of being fired upon by the enemy.

The LPX can carry 720 marines (+300 crew members), 10 tanks, 10 trucks, 7 AAVs, three field artillery pieces, and two LCAC hovercraft capable of landing on enemy shores doing 40 knots (74 km/h; 46 mph) - a mix that enables it to launch troop landings from both sea and air. She can also carry 10 helicopters when there are no ground vehicles on her hangar deck.

The flight surface is also sprayed with urethane, which can support VTOL jets, like Harriers. South Korea is considering the purchase of F-35B fighters to operate from its Dokdo-class ships. Currently, the LPX operates mainly UH-1H and UH-60P. However, both of these are designed for land based operations and lack abilities for ship-borne operations such as protection against damage from salty breezes making them difficult to operate on-board continuously. The KUH-Amphibious, the sea-based amphibious variant of the KAI Surion, is now under development. Production is planned to commence in late 2015 with some 40 helicopters planned.

Self-defense armament includes the RIM-116 Rolling Airframe Missile system. The Goalkeeper close-in weapon system (CIWS) was purchased in January 2003 from Thales, at a per-set price of 13,000,000,000 won (roughly $15,000,000).

The second ship of the class, Marado, was built with some changes compared to Dokdo. The flight deck is adapted to accommodate two V-22 Ospreys, while Dokdo was able to only carry one. In place of the Thales SMART-L multibeam radar and MW08 surveillance radar, Marado uses the Elta Systems EL/M-2248 MF-STAR multifunction surveillance radar and LIG Nex1 SPS-550K 3-D air and surface surveillance radar. It also has a different weapons suite than the 30 mm Goalkeeper and RAM, instead using two 20 mm Phalanx CIWS and having a K-VLS at the rear of the superstructure for the locally developed K-SAAM.

source: wikipedia
for more images go to the individual ship's page

dokdo class landing platform helicopter roks lph-6111 amphibious assault ship korean navy rokn 03c
LPH-6111 ROKS Dokdo

dokdo class landing platform helicopter roks marado lph-6112 amphibious assault ship korean navy rokn 03c
LPH-6112 ROKS Marado during her commissioning

dokdo class landing platform helicopter roks marado lph-6111 6112 amphibious assault ship korean navy rokn 06c radar ciws flight deck
superstructure details

dokdo class landing platform helicopter roks marado lph-6111 6112 amphibious assault ship korean navy rokn 15c well deck lcac
a landing craft air-cushion (LCAC) is approaching the well deck
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