advice amenities approved assistance blue care communicating communication conditions danger direction helpful hot-tub hot-tub-spa hydrotherapeutic-massage hydrotherapy indication indicator information informative informing jacuzzi outdoor outside red risk risky safety sign signs unhealthy-risk warning water white words air-controls bubbling high-volume jet-technology jets jetted-whirlpool large-tub low-pressure massage massage-jets pump-system pumps sanitized sanitizing small-pool spa spiraling swirl swirling warm warmed waterfall whirlpool activities angles architectural-elements architecture chemical-sanitation chlorinated covered exercise filled full glass heated indoor-pool indoors inside interior leisure light lighting lit maintained monitored paddling-pool recliners reclining recreation reflections relaxation seating shelter sheltered spa-pool swimming swimming-bath swimming-pool undercover wading-pool windows adult-area chairs chaise-lounges color colour comfort comfortable cruise-liner cruise-ship deck furniture holiday leisurely-travel lounge lounging outdoor-furniture peaceful quiet relax relaxing rest restful resting ship sunlounges vacation