Home    Products    Services   About Us    Contact Us  
ISE News Archives

The growing threat from new-generation mines that are more difficult to detect has stimulated the demand for new minehunting systems that offer improved safety and efficiency. The Dorado vehicle, which was in operational service with the Canadian Department of National Defence, was developed to meet this need. DCN International, of France, is selling the Dorado vehicle as part of their SeaKeeper system.

The Dorado vehicle is capable of towing a sonar towfish at speeds up to 12 knots and depths to 200 meters. It is powered by a 315 kW marine diesel engine. Air is drawn through the mast and exhausted through the stabilizer above the contra-rotating propeller. The engine also provides power for the hydraulically operated control planes and the keel-mounted winch for the sonar towfish. The towfish is developed to follow the seabed at low altitudes and is fitted with a multibeam side scan sonar.

Since the hull of the vehicle is deeply submerged, drag is greatly reduced over that of a surface drone. This permits the vehicle to operate at higher speeds and over longer ranges than surface based drones of similar size.

As the mast is the only part of the vehicle to be affected by sea state, the vehicle is much more stable in waves than surface drones or small vessels. This stability allows high-quality side scan sonar records to be obtained in elevated sea states at high speeds.

Since the vehicle has a surface-piercing mast, it is able to operate and transmit sonar data over a radio data link, rather than a fixed umbilical or an acoustic telemetry link. This permits standoff ranges of up to 10 km from the MCMV – ranges that are not possible from tethered drones or fully submerged UUVs. The mast also permits the use of D-GPS for continuous target positioning – again, this is a feature not available with UUVs or tethered drones.

Download the PDF datasheet.

ISE Semi-Submersible DORADO

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Principal Characteristics
Length 8.23 m
Width 2.28 m
Hull Diameter 1.17 m
Dry Weight (with fuel) 5900 kg
Fuel Capacity 725 kg
Dry Payload Capacity 0.60cu.m
Dry Payload Weight 210 kg
Speed 18 knots with no tow. Between 10 & 15 knots with tow
Endurance 12 hrs at 200 depth with tow. 28 hrs without tow
Sea State Sea State 4 for operations, Sea State 5 for transit
Propulsion Caterpillar 3126 - 315 kW, 6 cylinder, after-cooled, turbo- charged, marine diesel engine
Transmission ZF Marine 2.7:1 gear-reduction with hydraulic shifting - forward, neutral and reverse
Propeller Contra rotating gearbox and propulsor
Control Real-time, multi-tasking software
Ballast 3000 psi air ballast system. 900 kg drop weight
Sonar Winch Hydraulically operated winch capable of spooling 500 meters of 1 cm dia. Electro-mechanical or electro-optical-mechanical cable
Guidance & Nav iXSEA Octans FOG providing 50 Hz closed loop hydroplane control of depth, pitch, roll and heading
Command & Ctrl Manual, autopilot, or autonomous DGPS based line-following between geo-graphic waypoints. 400-465 mHz 9600 bps full duplex communication radio
Payload ISE Aurora Towfish, MB side scan sonar, 3.5 GHz OFDM WiLAN DataRadio. Other options are available