Subelement O: RADAR— Topic 94: RADAR Equipment
Question 3-94O3
Element 3 (GROL)In the term “ARPA RADAR,” ARPA is the acronym for which of the following?
Explanation
ARPA stands for Automatic RADAR Plotting Aid. This system is a vital component of modern maritime navigation, particularly on larger vessels, designed to enhance safety by automating collision avoidance. It utilizes the radar's raw data to detect, track, and calculate the course, speed, closest point of approach (CPA), and time to CPA (TCPA) of other vessels.
This automation significantly reduces the workload on navigators and provides critical information for decision-making to prevent collisions. It applies fundamental principles of radar signal processing and interpretation for maritime safety, directly relevant to navigation rules and practices. The other options are not recognized acronyms or functions associated with radar systems.
Related Questions
3-94O1 The permanent magnetic field that surrounds a traveling-wave tube (TWT) is intended to:3-94O2 Prior to testing any RADAR system, the operator should first:3-94O4 Which of the following is NOT a precaution that should be taken to ensure the magnetron is not weakened:3-94O5 Exposure to microwave energy from RADAR or other electronics devices is limited by U.S. Health Department regulations to _______ mW/centimeter.3-94O6 RADAR collision avoidance systems utilize inputs from each of the following except your ship’s: