Kingston Class Maritime Coastal Defence Vessels, Canada

The Kingston Class maritime coastal defence vessels were built by Halifax Shipyards Ltd owned by Saint John Shipbuilding of Canada. The first of the twelve ships was commissioned in September 1996 and the twelfth was commissioned in April 1999.

The ships are named the Kingston, Glace Bay, Nanaimo, Edmonton, Shawinigan, Whitehorse, Yellowknife, Goose Bay, Moncton, Saskatoon, Brandon and the Summerside. Six ships are stationed on the east coast for operations on the Saint Lawrence and the Atlantic and six ships are based on the Pacific Coast.

The 12 Kingston Class ships provide a single class of vessels for multi-function use by the Canadian Naval Reserves. Canada is the second largest country in the world and has a coastline of 243,791 km. The main roles of the ships are : coastal surveillance, naval reserve force training, mine countermeasures for route survey, minesweeping and mine inspection operations.

DESIGN

The hull is a longitudinally framed structure and has been designed to minimise the steel weight. The design was based on a hard chine hull form. The construction involved initial production of partially outfitted steel block units which were assembled into blocks and the blocks were integrated into the ship. The decks were assembled upside down with pre-outfitting of the underside of the deck prior to installation on the ship.

The vessels are capable of carrying two 20ft ISO containers on the open deck aft. The decks are fitted with the necessary power cables ready to install the containers which are mission-specific operational payloads.

The degaussing system from Power Magnetics and Electronic Systems of Rugely, Staffordshire (previously Thorn Automation) provides three dimensional control of the magnetic signatures. The size arrangement and location of the degaussing coils are based on finite element modelling of the ship structure and major equipment fits. The degaussing system consists of a masthead magnetometer which controls the output of the system's power units and the signature, four horizontal "M" coils, eight vertical "L" coils and five vertical athwartships "A" coils.

GUNS

The ship is equipped with a Bofors 40mm Model 60 Mk 5C rapid fire gun, and two 12.7mm machine guns. The Bofors gun is mounted on the forecastle deck and the arc of fire extends forwards by +/- 120°. The machine guns are mounted one either side at the front of the bridge deck. In a depressed position each machine gun fires in an arc of fire of 118°

MINE COUNTERMEASURES

The ship is equipped with one of three modular mine countermeasures systems which are the deep sea Thales MMS mechanical mine sweeping system, the route survey system and the Sutec remotely operated vehicle (ROV) mine inspection system.

SENSORS

The navigation equipment is a Kelvin Hughes I-band navigation radar and a global positioning system. The surface search radar is the E to F-band Kelvin Hughes 6000.

A towed high-frequency sidescan sonar is fitted for minesweeping.

PROPULSION

The ship is equipped with four main Wartsila UD 23V12 diesel motors and four alternators and two Jeumont electric motors (600 V DC). The two LIPS Z drive azimuth thrusters are fitted with fixed-pitch reversing propellers. The propulsion system is equipped with a central control and monitoring system. The propulsion system provides 15 knots maximum continuous speed. The range at the economical cruising speed of 9 knots using two engines is 5000 nautical miles with a 20% margin in tank capacity. Mechanical Minesweeping is carried out at 8 knots. The crash stop length is 5 ship lengths from a speed of 15 knots.