I think hand tight +1 turn is not sound advise. Tension is a per boat setting. For example a boat with swept spreaders is counting on the the shrouds to provide backstay function to one degree or another. Obviously tension on 16' skiff is going to different than 100' maxi
Depending on need to optimize you could play with rig tension on any given day depending on conditions. Many one design classes
allow you to adjust shroud
tension while racing
. Most handicap classes
In general cap shrouds should be very tight for most cruising boats. Excessive slop in leeward shrouds will cause excessive wear. Intermediate shrouds should be adjusted to remove any sag in the middle of the mast
while sailing upwind in normal conditions. The tension for this can only be sighted while sailing, and will vary greatly depending on number of spreaders and stiffness of mast.
Unless your boat is part of active aggressive one design class you are unlikely to find Loos gauge numbers that mean anything for your boat. Once tuned however, Loos gauge is great tool for returning mast to last year's settings.
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