Navigation, guidance and tracking apparatus and instruments; apparatus and instruments for geolocation; nautical apparatus and instruments; navigation devices; electric navigational instruments; electronic navigation apparatus; Global Positioning System (GPS) apparatus; GPS navigation devices; satellite-aided navigation systems; marine navigation apparatus; navigation apparatus for ships, boats, yachts, dinghies and other watercraft including both motorised and non-motorised water vehicles; compasses; navigational compasses; marine compasses; nautical compasses; directional compasses; digital compasses; digital sailing compasses; GPS tracking compasses; solar powered compasses; GPS tracking devices; autopilots; autonomous navigation systems for ships, boats, yachts, dinghies and other watercraft including both motorised and non-motorised water vehicles; autopilots for ships, boats, yachts, dinghies and other watercraft including both motorised and non-motorised water vehicles; sensors for measuring speed; sensors for determining velocity; anemometers; sensors for measuring wind speed and/or wind direction; wind pressure gauges; meteorological apparatus and instruments; automatic steering apparatus for watercraft