Umihana-class destroyer (Pacifica)

Umihana class

Class overview
Builders	Shiroimizu Naval Yard, VostMash
Operators	Royal Pelinese Navy
Preceded by	Partisan-class
Succeeded by	Project 213-17A
Built	2002-present
In commission	2004-present
Planned	65
On order	5
Building	3
Completed	57
Active	48
Laid up	4
General characteristics
Type	Guided missile destroyer
Displacement	12,100 tonnes at full load
Length	175 meters
Beam	20.5 meters
Draft	6.5 meters
Propulsion	IEP system, 104MW total
Speed	32 knots / 59 km/h maximum
Range	5,000nm / 9,000km
Complement	325
Sensors and processing systems	Dual C/S-band 3D AESA radar (air search / fire control); X-band AESA radar system (sea search / fire control); C-band radar (sea search); 3 x X-band CW radars (fire control); electro-optical sensors; variable-depth towed array sonar; bow sonar
Armament	1 x YAF O-98K 125mm naval cannon; 2 x 25mm autocannon RWS mounts; 4 x 32-cell VLS arrays; 2 x 4-cell ASCM launchers; 2 x 3-tube 324mm surface torpedo launchers
Armor	Aramid anti-fragmentation protection around critical systems
Aircraft carried	2 x Be-19 naval utility helicopters; 1 x Be-23 UAV-H
Aviation facilities	Hangars and facilities for 2 medium-size helicopters; auxiliary hangar and facilities for 1 small helicopter; stern helicopter deck

The Umihana class, also known in Pelinai by its development code Project 213-97B, is a class of guided missile destroyers currently operated by the Royal Pelinese Navy. The class is the most numerous surface combatant in the Royal Pelinese Navy of frigate size or larger, with 52 ships in active service and 8 additional ships under construction or in sea trials.

Umihana class vessels are multirole warships capable of performing a wide variety of tasks, including air defense, anti-submarine warfare, anti-surface warfare, land attack, and anti-ballistic missile/anti-satellite functions. The intended primary role of the Umihana class is defense of a carrier battlegroup; most active ships are assigned to provide long-endurance escort to Pelograd-class and Sakura-class aircraft carriers alongside the Ayame-class frigate and the Admiral Seisuko-class missile cruiser. The class’s ability to carry the K27M Almandine long-range interceptor missile also allows it to provide theater-wide ballistic missile defense and anti-satellite capability when provided targeting data by an Admiral Seisuko-class missile cruiser or a ground-based tracking station.

History

The first iteration of the concept for what would become the Umihana-class guided missile destroyer appeared in 1997 under the “21st Century Multirole Combatant” program, which was initiated by the Royal Pelinese Navy in late 1996 as a program to replace the aging Partisan-class destroyer used during the Pelinese Civil War. The keel of DDG-37, KPF Umihana, was laid down in 1999, with the ship being completed in 2002 and commissioned in 2004. 51 additional vessels of the class have since been commissioned, with an additional 8 in sea trials or shipyards.

Design

General characteristics

Umihana-class destroyers are unusually large for their ship classification, with a length of 175 meters, a beam of 20.5 meters, a draft of 6.5 meters, and a full-load displacement of 12,100 tonnes. Propulsion and electrical power for the class are provided by four 24MW Tyr TDB-13 gas turbine generators and two 4MW Tyr TD-91B diesel generators connected to an integrated electric power (IEP) system. Top speed and operational range are estimated to be 32 knots (59 km/h) and 5000 nautical miles (9000 kilometers), respectively. The procurement cost for an individual destroyer varies by contract, but is estimated to be approximately ~$800 million when including distributed initial development costs.

Armament

The armament of the Umihana-class was designed to be capable of performing a multimission role in the RPN, with a particular focus on area air defense for then-planned Pelograd-class aircraft carriers. The 12,000-ton displacement ships carry four 32-cell VLS system blocks, which are capable of launching SAMs, quad-packed point defense missiles, LACMs, and ASCMs. Two 324mm triple torpedo tubes are mounted to provide additional anti-submarine capability. A single O-98K 125mm naval cannon and two 25mm remote-operated autocannons give the Umihana-class limited shore bombardment capacity and function as self-defense weapons against approaching small craft. In addition to VLS-mounted SAMs and point defense missiles, two additional 24-cell point defense missile launchers are used in the short-range air defense and anti-missile roles.

Countermeasures

Defensive equipment mounted on the Umihana-class includes a full combined ELINT/ECM package as well as two Windshear-K CIWS arrays mounting both autocannons and point defense missiles. In addition to missiles stowed in the VLS blocks, the cannons and missiles on the CIWS turrets, and the point defense missile launchers, anti-missile fire can also be provided by the 125mm cannon and 25mm autocannons within their effective ranges.

Sensors

The two primary radars on the Umihana-class guided missile destroyer are the Type 118A “Sakura Petal” combined C/S-band radar and the Type 114A X-band radar. Both types are AESA radars; the Type 118A is intended to track and target aircraft, and the Type 114A is intended for use against naval vessels. Three X-band continuous wave radars are also mounted to provide fire control and targeting functions to SARH missiles. A C-band navigation and surface detection radar is also present.

A bow sonar and a variable-depth towed-array sonar are both fitted to the Umihana class in order to allow it to provide ASW detection coverage.

The Umihana’s combat information and fire control system is capable of sharing and receiving sensor and targeting information from nearby RPN ships and aircraft, and are also capable of performing data fusion with radar and sonar information from multiple ships in order to increase effective sensor resolution. The C-band component of the Type 118A is stated by the RPN to be capable of tracking and targeting stealth aircraft.