EP-3 SIGINT version.
Listening to someone rather than watching the water - signals intelligence gathering.
It is showing an irregular ADSB track data collection, indicated by the 'dashed' track.
The only accurate track data are the longer blue/coloured sections.
Broken/corrupt data occurs because of poor ADSB coverage or possibly the plane's own devices interfering.
Operated by USN VQ-1 World Watchers squadron out of Whidbey Island.