compass astrolabe sextant hygrometer smartwatch marine v h f radio inertial measurement unit automatic identification system protractor compass (drawing tool) marine chronometer glass cockpit attitude indicator gyrocompass g p s tracking unit dynamic positioning sunstone (medieval) satellite navigation device n a v t e x list of navtex stations portolan chart mariner's astrolabe automatic radar plotting aid planisphere star tracker navigational instrument vessel traffic service voyage data recorder octant (instrument) navigation system decca navigator system jacob's staff voskhod spacecraft " globus" i m p navigation instrument time ball celestial globe pace count beads fluxgate compass u-blox liahona ( book of mormon) opisometer electronic centralised aircraft monitor g p s aircraft tracking self-steering gear azimuth compass radar tracker nocturnal (instrument) rutter (nautical) g p s watch nonius (device) smart shoe schuler tuning chartplotter torquetum long-range identification and tracking (ships) pitometer log satellite data unit sun sensor spy basket silva compass rate of turn indicator u s h u s (sonar) inertial reference unit adrianov compass lubber line g n s s software-defined receiver l n-3 inertial navigation system reflecting instrument electromagnetic log electro gyrocator dip circle navcam advanced inertial reference sphere submarine signals parallel rulers traverse board geophysical m a s i n t astrocompass drift meter bris sextant ecompass rate integrating gyroscope personal navigation assistant doppler velocity sensor flinders bar earth inductor compass
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