This famous set of mathematical tables first published in 1803 with all the tables required for coastal and deep sea navigation. An essential requirement for anyone learning and practising astro-navigation.
The 2021 edition includes up-to-date, consolidated text in line with amendments adopted up to 1 July 2021 and updated unified interpretations that have been keyed to relevant articles and regulations.
Incorporates Amendment 07-23, which may be applied on a voluntary basis from 1 January 2024, anticipating its envisaged official entry into force on 1 January 2025.
Midrange Hexaratchet blocks grip loaded sheets, yet allow sailors to ease and trim quickly and with complete control. A switch on the side engages and disengages the ratchet mechanism.
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