C-7 



CORD I 



(Cabled Observation and Rescue Device) 



Operating Depth : 1,500 ft (i+5Tm); 2,000 ft (6lOm) goal 



Dimensions ( LxWxH ) : 68 in. x Ul in. x 55 in. (iTBcm x lOUcm x lUOcm) 



Weight (dry) : 720" lbs (32Tkg) 



Speed : (Max. Surface) 5 kts (9km/hr) 



(Max. Operating Current) 2 kts (3.Tkm/hr) at 1,500 ft 

 Structure: A U-shaped 10 in. (25cm) aluminum tube provides flotation and 

 serves as storage and protection for the bulk of the electronics. The base 

 of the vehicle consists of two rectangular oil-filled pods which serve as 

 the hydraulic reservoir and as mounting locations for electronic and hydraulic 

 components. 



Buoyancy: U-shaped, 10 in. (25cm) diameter, pressure-resistant, aluminiom 

 tube provides positive buoyancy when surfaced. Buoyancy submerged can be 

 controlled by plus or minus 15 lbs (6.8kg) through displacement of oil into 

 and out of a soft bladder. 



Power Requirements : 5 KW, U80 V 3-phase 60 Hz provided by an alternator in 

 SEA GUARDIAN (its support craft) which is hydraulically powered by a 115 hp 

 Ford diesel engine. A 0.35 in. (0.9cm) diameter, 1,850 ft (56Um) long, 

 armored, coaxial cable serves as the umbilical between support craft and vehicle. 

 Propulsion : Four hydraulically-powered, fixed, reversible propellers driven 

 by a 3 hp hydraulic motor. Two thrusters supply forward-aft motion (thrust), 

 one provides vertical motion (heave) and one provides lateral motion (yaw). 

 AM have continuously variable speed control. 



Instrumentation : Television and light on pan & tilt mechanism ( 360 degrees 

 azimuth; 110 degrees downward from the horizontal), current speed sensor, 

 temperature sensor, echo sounder. Magnetic compass, pressure/depth transducer, 

 scanning sonar ( 360 degree scan, 200 kHz search; 500 kHz local) with CRT 

 display. Manipulator: hydraulically-powered, two degrees-of-freedom, 

 scissors-type claw. 



Navigation : CORD is equipped with a 25 kHz pinger which can be powered 

 from the surface or is self-powered and pings at repetition rate of 

 once/second. Its support craft deploys three hydrophones, one mounted on 

 the starboard forward quarter, one amidships port side, and one on the starboard 

 side astern. The three hydrophones receive the outgoing ping and onboard 

 electronics process the signal by triangulation to provide a CRT display 

 showing the pinger 's position relative to the three hydrophones. Accuracy 

 of cord's position relative to its support craft had not been determined 

 at the time of this study. 



Shipboard Components : CORD is deployed from an aluminum surface utility 

 craft, SEA GUARDIAN, which has the following dimensional characteristics: 

 Length: 23 ft (7m) Speed (loaded): 8 kts (li|.8km/hr) 



Beam: 9 ft (2.Tm) Range: 60 nm ( 111km) 



Draft: 2 ft 1 in. (0.6m) Weight (loaded): U.5 tons (U.lt) 

 All controls and displays for the operation and monitoring of CORD are 

 aboard SEA GUARDIAN. Power is provided by a 115 hp Ford diesel engine 

 which drives three hydraulic pimps which power the main hydrostatic 

 transmission propulsion system, a 5 KW alternator and bow and stern 

 thrusters as well as a line hauler and storage reel. A dynamic positioning 

 system, within an enclosed cabin, maintains SEA GUARDIAN in position 

 over CORD. 



Support ' Graf t Requirements : At present CORD can only be fully deployed and 

 operated from SEA GUARDIAN. 

 Operating/Maintenance Crew: Three 



Total Shipping Volume : U9.3 cu yd (37-5 cu m) approximate 

 Total Shipping Weight : i+ . 9 tons (H.i+t) approximate 



Status: Operational 



Builder: Harbor Branch Foundation, Inc. 

 Ft. Pierce, Fl. 



