access alert authorities authority availability available boat boating-control communicating communication control deployment equipment fast flag foam froth Hong-Kong law law-&-order light movement naval observation on-duty on-the-job order patrol patrolling power presence regulations responsibility responsible sea secure security speed transport wake water watercraft white badges barriers bilingual cars distinctive emergency-vehicle flashing-lights lights marked motor-vehicle police police-vehicle symbols traffic traffic-control travel van vehicle bombay bridge bridges connect India mosque mumbai ocean on over set silhouettes sun top walk walking waves architecture classic element elements europe grating porto Portugal put reflect reflection saavem style window active adventure Athlete climb climbing wall man on the way top sport sports wall youth abandoned cage costly dumped left behind lost on its side shopping trolley theft trolley wheels abstract black career climbing groningen hold-on railing safety shape stair stairs vector