发明名称 |
Method and apparatus for determining and recording boat compass deviation |
摘要 |
A method and apparatus for determining and recording boat compass deviation which includes a novel apparatus which may be oriented with respect to either a line of sight bearing or a compass reading and includes means for recording at predetermined annular increments the difference between the boat's compass heading and the magnetic heading of the vessel.
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申请公布号 |
US4241511(A) |
申请公布日期 |
1980.12.30 |
申请号 |
US19790018608 |
申请日期 |
1979.03.08 |
申请人 |
FRIGANO, MICHAEL J |
发明人 |
FRIGANO, MICHAEL J |
分类号 |
G01C17/38;(IPC1-7):G01C21/22;G01C17/10 |
主分类号 |
G01C17/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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