| 摘要 |
PCT No. PCT/FI95/00135 Sec. 371 Date Sep. 10, 1996 Sec. 102(e) Date Sep. 10, 1996 PCT Filed Mar. 13, 1995 PCT Pub. No. WO95/25259 PCT Pub. Date Sep. 21, 1995An aid for navigation, positioning and/or orientation, said aid comprising a transparent plate (1) comprising a straight first edge (5); a straight second edge (7) which is at right angles against the first edge, a longitude line (4) which has been drawn on the plate (1) to parallel the first edge (5), a latitude line (6) which has been drawn on the plate (1) to parallel the second edge (7), and a position index point (3) which is located at the intersection of the longitude line and the latitude line, a latitude pointer (10) which is connected in the vicinity of the first edge (5) to be movable in direction paralleling the first edge, and longitude pointer (11) which is connected in the vicinity of the second edge (7) to be movable in direction paralleling the second edge. |
