DPO DPO Environmental Monitoring & Positioning Reference Systems

Question 1

Which positioning reference system uses shore-based radio beacons to provide corrected GPS signals for improved accuracy?

Accepted Answer

DGPS (Differential GPS)

Answer

HPR (Hydroacoustic Position Reference)

Answer

Taut Wire

Answer

Laser reference

Question 2

A fanbeam laser reference system is best suited for use in which operational scenario?

Accepted Answer

Close-proximity operations near fixed structures such as platforms

Answer

Deep-water drilling operations beyond 300m

Answer

Offshore anchor buoy positioning

Answer

Open-ocean transits

Question 3

What is the primary function of a wind sensor (anemometer) in a DP system?

Accepted Answer

To provide feedforward environmental compensation for wind forces

Answer

To trigger the anchor alarm

Answer

To measure current speed at depth

Answer

To calculate vessel draft

Question 4

A motion reference unit (MRU) provides the DP system with which type of data?

Accepted Answer

Roll, pitch, and heave measurements

Answer

Vessel heading and speed over ground

Answer

Thruster RPM and pitch feedback

Answer

Water depth and seabed profile

Question 5

When operating in a DP-2 configuration, how many independent position reference systems are typically required to be active and voting?

Accepted Answer

Three

Answer

One

Answer

Two

Answer

Four

Question 6

What does a high HDOP (Horizontal Dilution of Precision) value indicate about a GPS position fix?

Accepted Answer

Poor satellite geometry and reduced positional accuracy

Answer

Excellent satellite geometry and high accuracy

Answer

The GPS receiver is in differential mode

Answer

The vessel is in a restricted area