| 摘要 |
PCT No. PCT/GB92/01658 Sec. 371 Date Apr. 27, 1994 Sec. 102(e) Date Apr. 27, 1994 PCT Filed Sep. 10, 1992 PCT Pub. No. WO93/05362 PCT Pub. Date Mar. 18, 1993.A direction indicator includes a base defining four edges that extend parallel to a horizontal surface on which the base is placed and form portions of respective sides of a rectangle, a bearing indicator which is selectively positionable on the base for carrying compass bearing information, and a gnomon supported in a predetermined position relative to the direction indicator. The bearing indicator may further contain time markings in the event that it is used as a sundial. The base is adapted to be placed in a predetermined orientation on a horizontal surface. For a given orientation of the base, the direction indicator can be appropriately positioned relative to the base by reference to the direction of a shadow cast by the gnomon at a predetermined time of day and by reference to the bearing of the sun at that predetermined time of day.
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