I sometimes dubb it as a preventive anchor alarm… □ A free online version of this calculator with slightly reduced functionality is also available. It is described elsewhere on my home page: AnchorChainCalculator, and is available for Apple/iOS and Google/Android. For the latter, there is another app that can help you in working out the minimally required anchor chain and/or rope length and the associated anchor load. Of course, using such an anchor alarm does not mean you can neglect any of the other essential tasks and drills when anchoring, such as finding an appropriate anchorage to begin with, fit for any predicted changes in weather, making sure the anchor is properly set, and paying out enough chain and/or rode so as to reduce the anchor load to the minimal value and thus minimise the risk of dragging or worse from the start. Essentially, they raise an audio alarm when the vessel leaves a certain perimeter and thus raise your attention that the anchor may be slipping and your vessel be dragging. Here is a comprehensive feature comparison that you might find helpful.Īnchor alarm apps are a rather useful addition to increase the safety at anchor. There are so many anchor alarm apps available on Apple Store and Google Play Store that it becomes very tedious to compare them all.
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