Magnetic Compass Location And Installation On Large Merchant Vessels

On most large merchant vessels the standard compass is installed on the "Monkey Island", i.e. above the wheelhouse. It is usually viewed from the helm via a viewing tube, similar to a periscope. Often, electronic repeaters are installed so that compass headings can be viewed around the wheelhouse. Being installed on the highest deck of the ship enables it to be used for taking bearings and keeps it as far away from magnetic interference as possible.