Patent Number: 052415724
Section: claims

1. Apparatus for locating a floatable platform relative to an article submerged in a liquid, the improvement comprising support members arranged to be adjacent to the article, extendible members depending from the platform, the extendible members being locatable on the support members such that appropriate extension of the extendible members raises the platform from a buoyant to a partially-buoyant state, means for determining the position of the platform relative to the article, inspection means for inspecting the article, and a leg on which the inspection means is mounted, the leg being supported from the platform and being capable of extending below the platform. 2. Apparatus as claimed in claim 1, including a carriage from which the extendible leg is supported, first guide means, the carriage being located on and movable on the first guide means, and second guide means, the first guide means being located on and movable on the second guide means, the second guide means being disposed on the platform and aligned in a direction normal to the first guide means, thereby to provide x-y scanning of the inspection means relative to the article. 3. Apparatus as claimed in claim 1, wherein the support members are incorporated in a rack in which the article is locatable. 4. Apparatus as claimed in claim 3, wherein the extendible members have outwardly divergent conical lower ends and the support members have relieved upper ends. 5. Apparatus as claimed in claim 3, including radio means for linking the platform to a remote control station. 6. Apparatus as claimed in claim 1, including propulsion means on the platform, the propulsion means comprising a plurality of jets for ejecting the liquid therefrom below the surface of the liquid, and movable deflector means for deflecting the ejected liquid in a required direction so as to provide manoeuvrability of the platform. 7. Apparatus for locating a floatable platform relative to an article submerged in a liquid, the improvement comprising support members arranged to be adjacent to the article, extendible members depending from the platform, the extendible members being locatable on the support members such that appropriate extension of the extendible members raises the platform from a buoyant to a partially-buoyant state, means for determining the position of the platform relative to the article, the position determining means comprising laser means on the platform arranged to scan stationary coded targets remote from the platform, and a rack in which the support members are incorporated and in which rack the article is locatable. 8. Apparatus for locating a floatable platform relative to an article submerged in a liquid, the improvement comprising support members arranged to be adjacent to the article, extendible members depending from the platform, the extendible members being locatable on the support members such that appropriate extension of the extendible members raises the platform from a buoyant to a partially-buoyant state, means for determining the position of the platform relative to the article, a rack in which the support members are incorporated and in which rack the article is locatable, the article comprising a container for irradiated nuclear fuel.