Scarab IV
System description
The Scarab IV ROV system consists of the following major components:
A 150 electric HP ROV (2 X 75hp); main umbilical connecting the vehicle to the surface handling equipment; jetting skid; Launch and Recovery System (LARS) consisting of recovery crane, umbilical winch, Hydraulic Power Units (HPU), and the over boarding sheave; the Control Van (CV) which houses the Power Distribution Unit (PDU) and the control consoles; and a Maintenance Van.
Electric Power for the consoles and the vehicle is provided by a dedicated generator. Two generators are supplied for this purpose. In certain cases, the power supply can be provided by ship's power. The power supplied is 460 VAC, 3-phase, 60 Hz.
The vehicle components are controlled from the surface console through telemetry electronics located in the Telemetry Can on the vehicle. Telemetry and video signals are transmitted from the vehicle to the surface for display on the console monitors via optical fibers in the main umbilical.
The vehicle is raised and lowered with its latch probe mechanism system using a crane. The crane, umbilical storage drum, level-wind unit, hydraulic power and control unit comprise the surface handling equipment of the Scarab IV system.

The Scarab IV vehicle has an aluminum frame which is painted flat black and supports eight (8) thrusters, two (2) manipulators, fire pump, and various instruments. In its standard configuration the vehicle is equipped with ten (10) lights, four (4) pan and tilt units, three(3) B&W SIT cameras, one color camera, depth transducer, compass, sonar, long-range altimeter, short-range altimeter, pitch and roll sensors, responder/transponder, emergency transponder, radio beacon, strobe, and an Innovatum cable tracking system. A jetting skid is bolted to the underside of the vehicle's frame. System spares are provided in a Maintenance Van.
The Scarab IV System incorporates state-of-the-art technology for enhanced performance and ease of maintenance. All of the features which make the Scarab IV an advanced ROV system have been proven in the field.
Scarab IV System Weights & Dimensions (pdf)
System speifications

CONTROL VAN

Length

20 feet

Width

8 feet

Height

8.5 feet

Weight

15,500 lbs

CONSOLES (Nominal Dimensions and Weight)

Pilot's Console

Length

34.75 inches

Width

28.25 inches

Height

65.25 inches

Weight

283 lbs

Console #2

Length

26.25 inches

Width

36.0 inches

Height

65.25 inches

Weight

229 lbs

Tool Operator's (Navigator's) Console

Length

34.75 inches

Width

28.25 inches

Height

65.25 inches

Weight

288 lbs

Console #4

Length

26.25 inches

Width

22 inches

Height

65.25 inches

Weight

405 lbs

Supervisor's Center Console #1

Length

22 inches

Width

22 inches

Height

32 inches

Weight

152 lbs

Remote Observation Center

Length

22 inches

Width

22 inches

Height

30 inches

MAINTENANCE VAN

Length

20 feet

Width

8 feet

Height

8.5 feet

Weight

18,000 lbs

GENERATOR #1

Length

150 inches

Width

55 inches

Height (without muffler)

94 inches

Weight

10,000 lbs

Ratings

200 Kw, 250 KVA
Standby Duty;
200 Kw, 250 KVA
Continuous Duty; 1800 rpm; 3 phase, 60 Hz, 480 Volts

GENERATOR #2

Length

150 inches

Width

55 inches

Height (without muffler)

94 inches

Weight

9,000 lbs

Ratings

200 Kw, 250 KVA
Standby Duty;
200 Kw, 250 KVA
Continuous Duty; 1800 rpm; 3 phase, 60 Hz, 480 Volt

VEHICLE

Length

135 inches

Width

82 inches

Height

77 inches

Weight in air

9,663.2 lbs

Structure

6061-T6 Aluminum shapes with Stainless Steel fasteners

Diving Depth

1,800 meters

Flotation (Fixed)

Syntactic Foam

Payload

911 lbs (nominal)

Propulsion

Electro-Hydraulic (2 X 75hp)

Thrusters

8 X Hydraulic

Power Requirements

2500 VAC, 3 - Phase, 60 Hz - Motors
1500 VAC, 3 - Phase, 60 Hz - Electronics

Transformer

Western Transformers

Control

GESPAC Telemtery System

Cameras

3 X B&W, Wide angel SIT, 1 Color Standard Lens

Sonar

Mesotech, Model 971

Compass

Fluxgate KVH Industries

Depth Transducer

Paroscientific 8B2000

Pitch & Roll

Sperry Acustar 02338-03

Altimeters

Mesotech 807

Oil Pressure Transducer

Data Instruments, Model SA

Strobe

Navatech

Cable Tracker

Innovatum

Responder/Transponder

Nautronix

Emergency Transponder

Nautronix

Lights

10 X 250 Watt, ROS QL 3000

Radio Beacon

Novatech

Manipulator

2 X 7 Function 5 SC Magnum

Fire Pump

Stanley SM23B

JETTING SKID

Length

148 inches

Width

82 inches

Height

36 inches

Weight in Air

3000 lbs (nominal)

Structure

6061-T6 Aluminum shapes with Stainless steeel fasteners

Floatation (fixed)

Syntactic foam blocks

CABLE GRIPPER

Length

23.03 inches

Width

6.00 inches

Height

12.24 inches

Weight

122 lbs

CABLE CUTTER

Length

23.12 inches

Width

6.00 inches

Height

23.98 inches

Weight

94 lbs

WINCH

The Winch is comprised of three (3) major sub-assemblies; the Umbilical Storage Drum, Level-wind, and Hydraulic Power Unit

Capacity of Drum

7,000 feet 0f 1.43" cable with 3" flange remaining

Line Pull

22,500 lbs continuous with bare drum;15,000 lbs. @ full drum

In-Haul/pay-Out Rate

150 fpm at mid-drum

Electric Power

440/480 VAC, 3-Phase, 60 Hz, 180 Amps full load

Drum Dimensions:

Lebus Drum: Core Diameter

Core Width

Flange Diameter

 

Overall Width

Length

Height

 

55 inches

138 inches

78 inches

 

96 inches

127.5 inches

84 inches

Weight of Winch with Umbilical

35,000 lbs

Weight of Hydraulic Power Unit & Levelwind

15,500 lbs

RECOVERY CRANE

The Recovery Crane assembly is an articulated or knuckle boom crane consisting of the Crane, a constant Tension Winch, and the Swing Frame.

Capacity

28,000 lbs with 30 ft Extension, 360 deg Slew

Weight of Entire Assembly

41,000 lbs (nominal)

Constant Tension Winch;

Primary Drive Lift Rating

Constant Tension Mode

 

44,000 lbs @ 100 fpm

1,500 lbs @ 450 fpm

UMBILICAL

Length

7,150 feet (nominal)

Diameter

1.43 inches

Weight in Air

18,733 lbs