Maritime and Marine Marine Navigation and Charting 2

Question 1

What is the minimum number of GPS satellites needed to compute a two-dimensional position fix (latitude and longitude only)?

Accepted Answer

3

Answer

2

Answer

4

Answer

5

Question 2

What does 'Differential GPS' (DGPS) primarily improve?

Accepted Answer

The accuracy of GPS position fixes by applying land-based correction signals

Answer

The number of visible satellites in open ocean

Answer

GPS reception during heavy rain or fog

Answer

Battery efficiency of handheld GPS receivers

Question 3

What does the acronym 'ECDIS' stand for?

Accepted Answer

Electronic Chart Display and Information System

Answer

Electronic Chart Data and Information Software

Answer

Enhanced Course Display and Integrated Steering

Answer

Electronic Coastal Data and Integrated Sonar

Question 4

What does 'COG' indicate on a GPS or chart plotter display?

Accepted Answer

Course Over Ground

Answer

Compass On Grid

Answer

Current Outflow Gradient

Answer

Course of Guidance

Question 5

When using a GPS chart plotter near hazards, what is the most critical consideration to avoid position errors?

Accepted Answer

Verifying the GPS datum matches the chart datum

Answer

Setting display brightness for best visibility

Answer

Increasing the chart update rate for smoother movement

Answer

Keeping the screen free of glare and reflections

Question 6

What is a 'waypoint' in electronic navigation?

Accepted Answer

A predetermined geographic coordinate used as a reference point in route planning

Answer

A mandatory vessel reporting location required by the Coast Guard

Answer

A fixed depth contour line on an electronic chart

Answer

A location where a watch change is scheduled to occur

Question 7

What does 'SOG' represent on a marine GPS display?

Accepted Answer

Speed Over Ground

Answer

Signal Output Gain

Answer

Satellite Orbit Geometry

Answer

Standard Operating Guide