| 摘要 |
PCT No. PCT/FR94/00603 Sec. 371 Date Mar. 26, 1996 Sec. 102(e) Date Mar. 26, 1996 PCT Filed May 20, 1994 PCT Pub. No. WO95/09033 PCT Pub. Date Apr. 6, 1995An orientation aid for use when swimming on one's back comprises a hollow tubular support (20), an end piece (10 ) at one end of the support enabling the support to be held in a swimmer's mouth, and viewing means (30) attached to an opposite end of the support which is disposed above water during use.
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