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A bilge keel is a small blister running along the side of a ship's hull, used to reduce the hull's tendency to roll.
The additional underwater surface of the bilge keel creates extra resistance to the side-to-side rolling of the hull, but does not stop rolling altogether.
The bilge keel radius refers to the curvature of a ship's hull at the bilge, which is the area where the bottom of the hull meets the sides. A moderate bilge keel radius helps enhance stability and reduce rolling. Dead rise is the angle between the horizontal plane and the bottom of the hull, affecting how the ship interacts with waves and its overall seaworthiness. For the Panama Canal, specific dimensions and profiles are critical to ensure safe passage through its locks and channels, often requiring vessels to adhere to defined limits for both bilge keel radius and dead rise.
No the law does not require you to have a bilge pump, but on larger boats it is foolish to not have one.
The bilge keel is fitted at right angles to the bilge radiused plating but does not extend beyond the extreme breadth line . It positioned after model test to ensure minimum resistance to forward motion of ship .
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You should run your boats power ventilation for 30 seconds at least in order to eliminate fuel vapors in the bilge.
IN larger boats, the area at the very bottom of the boat is called the "bilge", and the water there is sometimes called "bilge water". To get rid of it, sailors use bilge pumps to pump the water over the side and out of the boat. For smaller boats that don't have bilge pumps, the sailors will "bail" the water out by scooping it up with any suitable container, and dumping it overboard.
Keel boats were and are used for transporting cargo, mainly inshore and on navigable rivers. They are powered barges in effect.
The keel boat was invented to provide stability and maneuverability to boats, especially in rough waters. The addition of a keel helps prevent capsizing and allows for better control over the boat's direction.
A bilge pump is not universally required on all recreational motor boats, but regulations can vary by state or country. Generally, boats that are 20 feet or longer are often required to have a functioning bilge pump to manage water accumulation. It's essential for boat owners to check local laws and regulations to determine specific requirements for their vessels. Additionally, having a bilge pump is a best practice for safety and maintenance.