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No-Vac at speed, 1933 Miss Jarvis on transport trailer, 2010 Hydroplane Miss America II on the Maumee River in Toledo, 1920. A hydroplane (or hydro, or thunderboat) is a fast motorboat, where the hull shape is such that at speed, the weight of the boat is supported by planing forces, rather than simple buoyancy.
Hull speed or displacement speed is the speed at which the wavelength of a vessel's bow wave is equal to the waterline length of the vessel. As boat speed increases from rest, the wavelength of the bow wave increases, and usually its crest-to-trough dimension (height) increases as well. When hull speed is exceeded, a vessel in displacement mode ...
A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally ...
Navigation and location of the ship by analytical means, after considering the following elements: initial location, bearing(s) — whether absolute bearings, surface bearings, or relative bearings. Also velocity as well as the external factors that have influenced the course either partially or entirely, such as the wind ( leeway ) and/or the ...
A navigator who needed to know the speed of the vessel had a sailor drop the log over the ship's stern. The log acted as a drogue , remaining roughly in place while the vessel moved away. The sailor let the log-line run out for a fixed time while counting the knots that passed over.
It was optimised for speed under oar, but usually also fitted with a sailing rig for appropriate conditions. The type was in use by Deal boatmen in the 18th century. It first occurred as a naval ship's boat after Deal boatbuilders recommended a different design to boats ordered from them by the Royal Navy to equip the cutters purchased in the ...
Hydrofoil high-speed boat Meteor on Lake Ladoga, Russia. Passenger hydrofoil Flying Dolphin Zeus moving at high speed near Piraeus, Greece. Meteor service between Saint Petersburg, Russia and the Kronstadt, a strongly fortified Russian seaport town, located on Kotlin Island, near the head of the Gulf of Finland. It lies thirty kilometers west ...
A motorboat with an outboard motor. A motorboat or powerboat is a boat that is exclusively powered by an engine; faster examples may be called "speedboats".. Some motorboats are fitted with inboard engines, others have an outboard motor installed on the rear, containing the internal combustion engine, the gearbox and the propeller in one portable unit.