a boat is at anchor in fog
According to the Navigation Rules, a rapidly ringing bell every minute signals a boat at anchor in the fog.
According to the Navigation Rules, a rapidly ringing bell every minute signals a boat at anchor in the fog.
According to the Navigation Rules, a rapidly ringing bell every minute signals a boat at anchor in the fog.
Not a thing. Your tax dollars at work.
5 seconds of rapid bell ringing
Yuo may have a faulty relay, or one or more bulbs are blown.
RNAV is Radio Navigation ("nav"). It is a form of electronic navigation that uses DME and other signals to form a point in the distance that an aircraft can fly to even though there is no actual signal coming from that point.
A pulsar is a rapidly rotating neutron star. It produces flashing signals, either in the visible light spectrum, or the radio spectrum, or both. When radio pulsars were first discovered, the period of the signal was so precise, it was originally thought that they were radio signals from an alien source.
Satellites used for Global positioning, send clock signals back to the earth, along with identity signals. The timing of the clock signals are very accurately controlled. The receiver uses the clock signals and by applying mathematical processes and comparing with an on board almanac, calculates the receiver's position. At least three signals from different satellites are required to fix a position. More signals then add to the accuracy.
Usually this tells you that 1 or more lights are burnt out.
No there is no fees for receiving satellite signals only if you want to transmit back to the satellite to send your position to another receiver or the internet
This answer depends greatly on the size of the vessel at anchor. Rules of the Road. RULE 35,SOUND SIGNALS IN RESTRICTED VISIBILITY (g/f) A vessel at anchor shall at intervals of not more than 1 minute ring the bell rapidly for about 5 seconds. In a vessel 100 meters or more in length the bell shall be sounded in the forepart of the vessel and immediately after the ringing of the bell the gong shall be sounded rapidly for about 5 seconds in the after part of the vessel. A vessel at anchor may in addition sound three blasts in succession, namely one short, one long and one short blast, to give warning of her position and of the possibility of collision to an approaching vessel.