air-controls amenities bubbling high-volume hot-tub hot-tub-spa hydrotherapeutic-massage hydrotherapy jacuzzi jet-technology jets jetted-whirlpool large-tub low-pressure massage massage-jets outdoor outside pump-system pumps sanitized sanitizing small-pool spa spiraling swirl swirling warm warmed water waterfall whirlpool advice approved assistance blue care communicating communication conditions danger direction helpful indication indicator information informative informing red risk risky safety sign signs unhealthy-risk warning white words adult-area chairs chaise-lounges color colour comfort comfortable cruise-liner cruise-ship deck furniture holiday leisure leisurely-travel lounge lounging outdoor-furniture peaceful quiet relax relaxation relaxing rest restful resting ship sunlounges vacation