Analysis of information sources in references of the Wikipedia article "Slipway" in English language version.
In 1925 Captain Sørlle of Vestfold fitted out a large factory ship, the S.S. Lancing, with a stern slipway: a long sloping ramp that led from a large hole in the stern up to the main deck. With the stern slipway whale carcasses could be hauled up to the deck by a steam winch and flensed even while the ship was on the open sea. Flensers no longer had to work on slippery carcasses floating alongside, a dangerous practice that could plunge them into freezing water.
[...] the apparatus [...] may be divided into two principal parts – the sliding-ways or slip-ways, which rest on the floor of the slip and present a smooth upper surface; and the cradle or temporary framework which rests and slides upon the slipways, and supports the ship [...].
[...] the Lancing, with the first stern slipway, left Sandefjord on 5 June 1925 [...]. [...] In order to train hands in the new form of catching, [...] whaling was carried out that summer off the Congo, and the occasion when the first humpback whale was hauled on to the deck on 14 July 1925 marked a milestone in the history of whaling. [...] the Lancing's operations in 1925–6 were to prove of decisive importance in the transition to the new epoch of whaling.
In 1925, [Petter] Sørlle outfitted the Lancing with a stern slipway – a large trapdoor in the back of the ship that could be opened and closed as needed [...] – as well as a ramp, winch, and whale claw. These tools enabled the crew to grab and hoist a whale into the main deck for flensing and processing before the carcass froze.
The space between the upper (or flensing) deck and the lower (or tank) deck is occupied by the factory plant and machinery. [...] The whales caught by the attendant whale catchers are hauled up a slipway, which lies aft above the two propellers, on to the flensing deck.
