Answer: knots

AnswerCrossword Clue
KNOTSBowline and sheepshank
KNOTSSeagoing speed units
KNOTSDifficult problems
KNOTSGranny and reef
KNOTSHitch, slip, and granny
KNOTSSquare and granny
KNOTSSailor's speed units
KNOTSOne of these begins 21, 34, 44, and 58A
KNOTSArray for a Boy Scout
KNOTSGale's 40, on the Beaufort scale
KNOTS".. Landing"
KNOTSHitches, e.g.
KNOTSShoelace problems
KNOTSGranny and square
KNOTSSailor's expertise
KNOTSShoelace annoyances
KNOTSShip-speed units
KNOTSYacht units
KNOTSBoy Scout's expertise
KNOTSRope securers
knotsto become tied or tangled
KNOTSNautical units
KNOTSNautical speed units
KNOTSShip speed units
KNOTSEntanglements
KNOTSMasseur's targets
KNOTSMassage targets
KNOTSGranny's family?
KNOTSGranny and kin
KNOTSTrigger points
KNOTSBowlines, e.g.
KNOTSGranny and Windsor
KNOTSGranny and others
KNOTSClusters
KNOTSSailor's array
KNOTSArea of expertise for sailors
KNOTSGranny and clove hitch
KNOTSStomach distress
KNOTSFastening loops
KNOTSSites of future holes, maybe