Question 878Navigation General

The correct answer is A) The master may, at his/her discretion, turn off the AIS if he/she believes that it may compromise the safety or security of the vessel. This is correct because under the regulations, the master has the discretion to turn off the AIS if they believe it may compromise the safety or security of the vessel. The other options are incorrect because they state either overly restrictive or overly broad requirements for AIS operation that are not consistent with the regulations. Option B is incorrect because AIS is not always required to be operating in a VTS area - the master can turn it off if they believe it's necessary for safety or security. Option C is incorrect because there are circumstances where the master can turn off AIS, such as for safety/security reasons. Option D is incorrect because AIS is not universally required within 100 nautical miles of the coastline.