Assertion: sail | /r/AtLocation | use
Facets:
Source sentences:
text: Once everything is in place you must tighten up the hose clamps to prevent any of those lines slipping when the sail is in use.
text: When sail 20 is in use, it is leading spar 22 which is turned into the wind, and therefore curved leading edge 40 offers less wind resistance similar to the leading edge of an airplane wing.