Be aware that those arrows are connected to a booking engine for inventory. They will never show more than a dozen or so cabins available, usually less depending on the cruiseline even if the entire ships inventory can be booked. The cruiselines release for view only a few cabins at a time on the booking engines. Primarily to make it appear they are always running out of cabins for urgency. For actual inventory or a specific cabin request, you need to actually call the cruiseline or your T/A. There are usually more cabins available than on any system including the cruiselines own systems that show availability. Also handicap accessible will not show as they are not released unless requested or the ship is nearly full. If there is a cabin or location you want call and check to see if it's there, often it will be.