Question 729Navigation General70% to pass
How many characters does the short text messaging feature of the automatic identification system (AIS) allows for?
AI Explanation
The correct answer is D) 158 characters.
The automatic identification system (AIS) on ships allows for a short text messaging feature that can transmit up to 158 characters. This is the maximum character limit set by the International Telecommunication Union (ITU) and the International Maritime Organization (IMO) for the AIS messaging functionality.
The other answer choices are incorrect because 56 characters (option A) is too low, 64 characters (option B) is the maximum for certain other maritime messaging systems but not for AIS, and 128 characters (option C) is also lower than the actual 158-character limit for AIS short text messages.
Related Questions
#727 You are radar scanning for a buoy fitted with a racon. In illustration D017NG below, which radar screen represents the presentation you should expect on the PPI? #728 When using an ARPA, what should you consider in order to evaluate the information displayed? #730 Your vessel is participating in the Voluntary Observing Ship Program, you are preparing WS Form B-80 as seen in illustration D041NG below. The sky is overcast, and the anemometer indicates that the apparent wind is from 144° relative at 8 knots. You are on course 162°T at 15 knots. How should you encode group Nddff? #731 Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error? #732 In most cases, the direction of the apparent wind lies between the bow and _______________.