Diver Safety

The MiniROVER® MKII and PHANTOM DHD2 + 2 vehicle systems can supplement manned diving operations by performing support tasks. The systems can also be used to observe, document, and provide additional illumination for the working divers. However, because of electrical safety reasons, neither can interface direcdy with divers in the water.

The diver and ROV umbilical can become entangled. Also, ROVs can injure divers, through collision, with thrusters, or with tools on the vehicle such as a manipulator jaw. The following are guidelines for operations with divers and ROVs working in the same vicinity:

• ROV operators come under control of dive supervisor when diving is in progress.

• All personnel should be briefed on ROV operations and safety concerns.

• Maintain a direct communication link between the dive supervisor and ROV operator.

• MiniROVER* and PHANTOM DHD 2+2 are not equipped with fully-approved ground fault detection circuits, so a minimum standoff distance of 5 feet must be maintained.

• Use only trained and experienced ROV operators.

Vessel anchored or "live boating"

Umbilical cable attached to down line every 3 feet with heavy duty tape

I 1/2-in. polypropylene down line

See below*


operating radius j (typical) f

50 - 300-lb mushroom anchor (depressor weight) p. 2p feet


operating radius j (typical) f

Underwater vehicle

Ocean flloor

"Maximum depth recommended - 400 feet for MiniROVER® MKII

- 1,500 feet for PHANTOM DHD2

Figure 2-50. Deep water configuration.

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