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Sail country codes must comply with World Sailing Racing Rules of Sailing. The Racing Rules of Sailing Appendix G1.2 specifies that national letters shall be clearly legible and of the same color. [1] They must be placed below the class insignias and above the sail number. In 1992, the code system was aligned to the one of IOC and has followed ...
Each class of boat is assigned a "Portsmouth Number", with fast boats having low numbers and slow ones high numbers—so, for example, in the case of two dinghies, a 49er might have a RYA-PY of 697 while a Mirror has a RYA-PY of 1390 (these are the actual RYA Portsmouth numbers for 2018, but note that adjustments are made each year).
The boat has a draft of 3.50 ft (1.07 m) with the keel extended and 1.75 ft (0.53 m) with it retracted, allowing operation in shallow water or ground transportation on a trailer. [ 1 ] [ 4 ] The boat is normally fitted with a small 2 to 6 hp (1 to 4 kW) outboard motor for docking and maneuvering.
The hull number visible on both sides of the bow of USS Arleigh Burke, DDG-51. A hull number is a serial identification number given to a boat or ship. For the military, a lower number implies an older vessel. For civilian use, the Hull Identification Number (HIN) is used to trace the boat's history. The precise usage varies by country and type.
The process of determining the PHRF for an individual boat begins with the regional PHRF rating, then adjustments are made for the individual attributes of the boat such as: modifications to the rig, the size of the largest foresail (jib or genoa), the size of the spinnakers, type of keel (full, fin, wing etc.), the number of blades on the propeller, and the style of the propeller (fixed ...
The combination of symbol and hull number identify a modern Navy ship uniquely. A heavily modified or repurposed ship may receive a new symbol, and either retain the hull number or receive a new one. Also, the system of symbols has changed a number of times since it was introduced in 1907, so ships' symbols sometimes change without anything ...