OUPV Marine Navigation 2

Question 1

What does a red nun buoy with even numbers indicate in the U.S. buoyage system?

Accepted Answer

The right side of a channel when returning from sea

Answer

Red nun buoys mark the right (starboard) side of a channel when returning from sea, following the red right returning convention.

Question 2

What is the purpose of a dayboard on a navigation aid?

Accepted Answer

To identify the aid during daylight hours through its shape and color

Answer

Dayboards are colored markers mounted on fixed structures that help mariners identify aids to navigation during daylight hours.

Question 3

What does GPS WAAS provide compared to standard GPS?

Accepted Answer

Improved accuracy to approximately 3 meters or better

Answer

WAAS (Wide Area Augmentation System) improves GPS accuracy from approximately 15 meters to about 3 meters by providing correction signals.

Question 4

When navigating at night, what do two vertical red lights on a vessel indicate?

Accepted Answer

Vessel not under command

Answer

Two red lights in a vertical line indicate a vessel that is not under command (unable to maneuver as required by the Rules).

Question 5

What is the significance of a safe water mark in the IALA buoyage system?

Accepted Answer

It indicates navigable water all around, typically marking a channel entrance or centerline

Answer

Safe water marks indicate that there is navigable water all around the mark. They are used at channel entrances, centerlines, and mid-channel positions.

OUPV - Operator Uninspected Passenger Vessel Practice Test

OUPV - Operator Uninspected Passenger Vessel Practice Test

OUPV Marine Navigation 2