above-the-deck angles background cables cabling communicating communication cruise-liner cruise-ship decks edges exterior Indian-ocean journey ladder lighting lights lines navigation navigational-lights ocean onboard perspectives railing rails safety secure security signal-light sunlight tower transport transportation travel view views warning-lights barrier barriers coastal colors colours curved curves deck deck-side leisure leisurely-travel levels light luxury passengers railings side surface surfaces texture textures tourism tourists wallpaper water airy architecture atrium bright ceilings central circular ELEVATORS floating-staircase flooring floors height high interior lifts multi-stories open-space piazza-style relaxation relaxing soaring space spacious staircases stairs style across bridge bus coach comfortable empty flowering flowers hi-tech modern movement moving multi-lingual no-passengers on-board-tour-commentary plants seating seats silhouette Singapore traveling travelling