Lifeboat (shipboard) in the context of "Superstructure"

RMS Titanic sank on 15 April 1912 in the North Atlantic Ocean. The largest ocean liner in service at the time, Titanic was four days into her maiden voyage from Southampton, England, to New York City, United States, with an estimated 2,224 people on board when she struck an iceberg at 23:40 (ship's time) on 14 April. She sank two hours and forty minutes later at 02:20 ship's time (05:18 GMT) on 15 April, resulting in the deaths of up to 1,635 people, making it one of the deadliest peacetime maritime disasters in history.

Titanic received six warnings of sea ice on 14 April, but was travelling at a speed of roughly 22 knots (41 km/h) when her lookouts sighted the iceberg. Unable to turn quickly enough, the ship suffered a glancing blow that buckled the steel plates covering her starboard side and opened six of her sixteen compartments to the sea. Titanic had been designed to stay afloat with up to four of her forward compartments flooded, and the crew used distress flares and radio (wireless) messages to attract help as the passengers were put into lifeboats.

RMS Lusitania was a British ocean liner launched by the Cunard Line in 1906 as a Royal Mail Ship. She was the world's largest passenger ship until the completion of her running mate Mauretania three months later. In 1907, she gained the Blue Riband appellation for the fastest Atlantic crossing, which had been held by German ships for a decade.

Though reserved for conversion as an armed merchant cruiser, Lusitania was not commissioned as such during WWI but continued a transatlantic passenger service, sometimes carrying war materials, including a quantity of .303 ammunition, in her cargo. The German submarine U-20 hit her with a torpedo on 7 May 1915 at 14:10, 11 miles (18 km) off the Old Head of Kinsale, Ireland, leading to her sinking about 18 minutes later. Only six of several dozen lifeboats and rafts were successfully lowered; there were 767 survivors out of the 1,960 people on board, while 1,193 perished.

Lifeboat is a 1944 American survival film directed by Alfred Hitchcock from a story by John Steinbeck. It stars Tallulah Bankhead and William Bendix, alongside Walter Slezak, Mary Anderson, John Hodiak, Henry Hull, Heather Angel, Hume Cronyn and Canada Lee. The film is set entirely on a lifeboat launched from a freighter torpedoed and sunk by a Nazi U-boat.

The first in Hitchcock's "limited-setting" films, the others being Rope (1948), Dial M for Murder and Rear Window (both 1954), it is the only film Hitchcock made for 20th Century Fox. The film received three Oscar nominations for Best Director, Best Original Story and Best Cinematography – Black and White. Bankhead won the New York Film Critics Circle Award for Best Actress.

An inflatable boat is a lightweight boat constructed with its sides and bow made of flexible tubes containing pressurised gas. For smaller boats, the floor and hull are often flexible, while for boats longer than 3 metres (9.8 ft), the floor typically consists of three to five rigid plywood or aluminium sheets fixed between the tubes, but not joined rigidly together. Often the transom is rigid, providing a location and structure for mounting an outboard motor.

Some inflatable boats can be disassembled and packed into a small volume, so that they can be easily stored and transported. The boat, when inflated, is kept rigid cross-ways by a foldable removable thwart. This feature makes these boats suitable for liferafts for larger boats or aircraft, and for travel or recreational purposes.