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Description: | The log glass was used in conjuntion with a log and line in order to time the period during which the line was allowed to unroll from a reel and so estimate the ship's speed. Usually this was for a period of up to half a minute. This brass log glass timed a period of 14 seconds and has '14 SEC' inscribed on it.
caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | estimator logs | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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