Long-tail boat

A boat is a watercraft of any size designed to float or plane, to provide passage across water. Usually this water will be inland (lakes) or in protected coastal areas. However, boats such as the whaleboat were designed to be operated from a ship in an offshore environment. In naval terms, a boat is a vessel small enough to be carried aboard another vessel (a ship). Another less restrictive definition is a vessel that can be lifted out of the water. Strictly speaking and uniquely a submarine is a boat as defined by the Royal Navy^{[citation needed]}. Some boats too large for the naval definition include the Great Lakes freighter, riverboat, narrowboat and ferryboat. The term armed boat, used primarily by English speaking naval forces, referred to any boat carrying either a cannon or armed occupants, such as marines^{[citation needed]}.

The long-tail boat, known as Ruea Hang Yao (เรือหางยาว) in the Thai language, is a type of watercraft native to Southeast Asia, which uses a common automotive engine as a readily available and maintainable powerplant. A craft designed to carry passengers on a river may include a lightweight long canoe hull, up to 30 metres, and a canopy. There is much variation among these boats, some have evolved from traditional craft types, while others have a more improvised look—the sole defining characteristic is a secondhand car or truck engine.

This engine is invariably mounted on an inboard turret-like pole which can rotate through 180 degrees, allowing steering by thrust vectoring. The propeller is mounted directly on the driveshaft with no additional gearing or transmission. Usually the engine also swivels up and down to provide a "neutral gear" where the propeller does not contact the water. The driveshaft must be extended by several metres of metal rod to properly position the propeller, giving the boat its name and distinct appearance.

Advantages to the inboard engine with a long driveshaft include keeping the engine relatively dry. Following the basic design pattern allows a variety of engines to be attached to a variety of different kinds of hulls. This flexibility simplifies construction and maintenance while sacrificing the efficiency and comfort that might be expected of a typical mass-produced product.

Ko Phi Phi Don (Thai: เกาะพีพีดอน, pronounced [kɔ̀ʔ pʰīː pʰīː dɔ̄ːn]) is the largest of the Phi Phi Islands, in Thailand. The islands are administratively part of Krabi province. It is the only island in the group with permanent inhabitants.

Like the other islands in the group, Ko Phi Phi Don is a non-volcanic island largely made of limestone. It is almost separated into two islands, but a strand of flat land connects them. On this strand lies the largest town on the island, as well as most of the resorts.

The Phi Phi Islands (Thai: หมู่เกาะพีพี, Thai pronunciation: [pʰīː pʰīː]) are located in Thailand, between the large island of Phuket and the western Andaman Sea coast of the mainland. The islands are administratively part of Krabi province. Ko Phi Phi Don ("ko" (Thai: เกาะ) meaning "island" in the Thai language) is the largest island of the group, and is the only island with permanent inhabitants, although the beaches of the second largest island, Ko Phi Phi Lee (or "Ko Phi Phi Leh"), are visited by many people as well. The rest of the islands in the group, including Bida Nok, Bida Noi, and Bamboo Island (Ko Mai Phai), are not much more than large limestone rocks jutting out of the sea.

Phi Phi Don was initially populated by Muslim fishermen during the late 1940s, and later became a coconut plantation. The Thai population of Phi Phi Don remains more than 80% Muslim. The actual population however, if counting laborers, especially from the north-east, from the mainland is much more Buddhist these days.

The islands came to worldwide prominence when Ko Phi Phi Leh was used as a location for the 2000 British-American film The Beach. This attracted criticism, with claims that the film company had damaged the island's environment, an accusation the film's makers contest. The film's release was attributed to an increase in tourism to the islands. Phi Phi Leh also houses the 'Viking Cave', from which there is a thriving bird's nest soup industry.