Abstract: A plant illumination device positioned above a plant tray to illuminate plants in the plant tray is disclosed. The device comprises a reflector and a light source, wherein the light source is arranged to emit light directed towards the reflector and the light is reflected by the reflector towards the plant tray. The reflector has a shape in a cross-sectional plane perpendicular to a length direction wherein the shape comprises a central portion and two peripheral portions adjacent to the central portion and the shape is symmetrical with respect to an axis of symmetry extending through the central portion along a height direction perpendicular to the length direction, The central portion comprises a protrusion at the axis of symmetry that protrudes downward along the height direction towards the light source. The peripheral portions of the reflector reflect the light received from the central portion towards the plant tray.

Abstract: Device for positioning and orienting a boat on a navigational chart by data supplied by a communication via satellite (Global Positioning system), more commonly designated G.P.S., comprising two superposed disks, one serving as lower protractor (D1) provided with a North mark, the other as upper reader (D2), connected in their rotation center by an eyelet (24), two positioning rulers (R1, R2) punched by a longitudinal central aperture (4,5) and present on their edges a tenon which allows them to slide freely, each one in a mortised slide provided on each disk. During the positioning on the chart, the two disks are blocked (D1, D2) one against the other, the lower disk (D1) such as its North mark are placed in direction of the chart, the two rulers (R1, R2) are blocked perpendicularly one towards the other but with free slide. The disks are unlocked (D1, D2) during the orientation, and the upper disk (D2) can pivot with the upper niler (R2) which is used as orientation ruler.