The Ocracoke light is a steady beam.
analog signal
The captain used a signal flare to let the lighthouse know they were there.
Out-of-band
A lighthouse signals passing boats that there is land nearby.
They use some type of radio detection and mapping AKA Radar. They could also use a good old fashioned Lighthouse.
The oldest working lighthouse in North America is called Sambro; it is on Sambro Island, Nova Scotia, Canada, and was built 1758. The oldest working lighthouse in the United States is the Sandy Hook lighthouse in New Jersey, built 1765.
There are an estimated 92 lighthouses that are located in the UK. A few of the lighthouses are called South Gare lighthouse, Shoreham lighthouse, and Bamburgh lighthouse.
sampling is a one type of process use for converting into analog signal to digital signal.
Unlikely. The lighthouse was destroyed in the 1300s.
Navigation.
they are used to call help
Historically, it has been. Nowadays, with devices such as GPS in use, not so much.