one prolonged blast
five or more short blasts
one prolonged blast
Incomming signal alert.
What does the wavering tone warning signal alert a base for
siren; alert; alarm;
Air Attacks
air attack
air attack
When approaching and going around blind corners, at blind intersections, any other time it is necessary to signal and alert others to a hazard.
The word 'alert' is an adjective, a verb, and a noun.The noun 'alert' is a word for a state of being watchful; a signal or warning of danger; a word for a thing.The adverb form of the adjective 'alert' is alertly.The pronoun that takes the place of the noun 'alert' is it.
Vessel operators can alert the lock attendant of their request to transit through the lock by sounding one prolonged blast followed by one short blast
It is the responsibility of the captain of the vessel to ensure that it can be detected when sailing in fog- nowadays this is mostly done by GPS and by the use of radio communication, but the skipper of a sailing vessel in foggy conditions should also use a foghorn of some kind, be it a hand-held horn powered by compressed air, or a more sophisticated electrical or pneumatic type that is installed on the vessel itself. There is no set type of audio signal to alert other mariners that a sailing vessel is in the vicinity- morse code is no longer used and most modern sailors don't understand it, so it would just be a general foghorn note.
The word 'alert' is an adjective, a verb, and a noun.The noun 'alert' is a word for a state of being watchful; a signal or warning of danger; a word for a thing.The noun form of the adjective 'alert' is alertness.The noun form of the verb to 'alert' is the gerund, alerting.