A pilot boat is a type of boat used to transport pilots between land and the inbound or outbound ships that they are piloting.
The origins of the word pilot probably disseminates from the Latin word pilota, a variation of pedota, the plural of pēdón which translates as oar. There is also evidence the word pylotte was also used, again a variation from pedota. The word originated from around 1520-1530.
However, the work functions of the maritime pilot go back to Ancient Greece and Roman times, when locally experienced harbour captains, mainly local fishermen, were employed by incoming ships captains to safely bring into port their trading vessels. Eventually, in light of the need to regulate the act of pilotage and ensure pilots had adequate insurance, the harbours themselves licensed pilots for each harbour.
Although licensed by the harbour to operate within their jurisdiction, pilots were generally self-employed, meaning that they had to have quick transport to get them from the port to the incoming ships. As pilots were often still dual-employed, they used their own fishing boats to reach the incoming vessels. But fishing boats were heavy working boats, and filled with fishing equipment, and so a new type of boat was required.
Early boats were developed from single masted cutters and twin masted yawls, and latterly into the specialist pilot cutter. These were effectively light-weight and over powered single masted boats with large steeply angled keels, making them deep draft under power and shallow draft in lighter sail.
If legend is to be believed, the first official Bristol Channel pilot was barge master George James Ray, appointed by the Corporation of Bristol in May 1497 to pilot John Cabot's Matthew from Bristol harbour to the open sea beyond the Bristol channel. In 1837 Pilot George Ray guided Brunel's SS Great Western, and in 1844 William Ray piloted the larger SS Great Britain on her maiden voyage.
Modern pilot boats can be from 20 feet to over 75 feet in length, built to withstand heavy seas and bumping against 100,000 ton tanker ships, they are high powered and hence both very quick and durable, purpose built boats. They are normally painted a highly visible colour such as orange, red or yellow.
Pilot boats are specially marked to make it clear what their function is. During the day they fly the "H" flag and normally the word PILOT(s) is written in clearly visible, large, letters on the sides.
At night they have special navigation lights: apart from their normal green/red + white stern navigation lights they have a "white over red" toplight which is 360° round visible. As tool to remember white over red means "white cap above red nose", a reference to the stereotype of pilots as heavy drinkers.
Pilot boats are often also using bright colors, like flashy yellow, to make them clearly visible and distinctive in even the worst conditions. This last mainly applies to the so-called pilot tenders: the vessels that go to the ships to bring the pilot on board of arriving ships or pick them up from departing ships. Depending on the local situation the tenders might be launched directly from a nearby harbour or they are coming from the central (large) pilot station: a pilot boat located at a pre-defined location at sea near a pilotage area. In earlier days nearly all pilots came from a "pilot station" at sea, but with the modern very fast tenders it is often more practical not to have a permantly manned pilot station at sea, but transfer the pilots directly to/from shore.
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