accuracy antigen check checking colloidal coronavirus covid-virus detection diagnosis diagnostic-aid dropper drops home-use immunochromatographic-technology kit limitations limited lysis-buffer measuring-instrument medical nasal-secretion negative-result plastic quality-control-C-line rapid rectangular result sample sampling-tube self-testing test test-cassette testing alone beach beaches boat boats both controls cornwall fishmonk for hire hire boat lone moor moored mooring motorboat motorboats ocean pair powerboat powerboats red ripple rippled ripples rope saint ives sea seas self drive self-drive speedboat speedboats st ives steering stern two wave waves wheel windscreen Windshield one only sole advice answer business challenge challenging choice choose concept control cross decision decisions difficult difficulty direction expertise illustration key leadership manage management negative negativity no opportunity organisation organization pencil positive positivity problem Question questionnaire right solution solve solving teamwork tick tick-box trouble troubleshoot troubleshooting uncertain uncertainty wrong yes Catamaran catamarans crew deck enjoyment equipment fun guard rails lines men multihulled multihulls nylon outdoor-sport outdoors passengers people pleasure craft rails recreation recreational sailing relaxing rigging rigging equipment ropes safety sail sailing sea-going yacht secure ship under-sail water women yacht yachting aggression anger angry arguing argument bad behaviour bossy bullying communication conflict conversation couple depression despair divorce excuse explain explanation failure family frustration furious hurt infidelity love man married pain persuade persuasion placate reason reasoning relationship sad sadness shouting sorrow speak split sulk sulking unhappy upset woman worry yell aged ancient antique backdrop background blue border custom customs damaged decoration decorative free grime grimy grunge grungy icon image immigration inspection isolated officer old page paper parchment patrol pictogram pictograph picture resource sheet sign signage somadjinn square stock symbol symbolic texture textured travel traveling travelling vintage white worn animal Asia beast bos-taurus bovine cattle cloven-hooved common cow cud-chewing dairy-cow domesticated Ears eating eye fawn folds grass grazer grazing greenery head herbivore horns individual landscape leg livestock mammal moving nature neck plants quadruped quiet restraining restraint ruminant rural-area snout solitary tethered Ungulate weeds