Pilot change

KITTIWAKE ( MMSI 232008570) is a Pilot and currently sailing under the flag of United Kingdom (UK) Here she is speeding down the River this morning.

Vessel name: Polaris ; Year built: 2012 ; Flag: Netherlands ; Homeport: Rotterdam Length: 81.2m X 13.3m ; GRT: 2501 ; Callsign: PBZN ; MMSI:245142000 ; IMO: 9496915 Type: Special Vessel / Pilot Ship A "Pilot Ship / Pilot Vessel" is a "special type" of ship in which it accommodates a certain and limited Marine Pilots (Sea, River, Harbor Pilots), it also carries small boats/crafts that are used to tender services to and from the Pilot ship. In a Pilot Vessel, the Pilots can take their time...

It's on the Tees, vessel is the Saltholme.

Floating pilot transfer station for the provision of pilots in the Weser estuary / German Bight sets sail again after a stay of several hours for supplies at Willy Brandt Platz on the Weser. The ship is approx. 61 metres long, 25 metres wide and has a draught of approx. 6.4 metres. It was completed at the Abeking & Rasmussen shipyard in 2010. The catamaran-style hull construction is striking. Slight distortions in the picture are due to the stabilisation in Google Photos.
Original sound...

WESTDIEP PILOT (IMO: 9568988) is a Pilot Ship that was built in 2011 (10 years ago) and is sailing under the flag of Belgium.

Here’s a nice little video of pilotage at the Port of Cork as Safehaven’s Interceptor Pilot 48 ‘Solas’ undertakes pilot transfer with the Grimaldi line ferry ‘Grande Spagna’ in a heavy swell. We captured some fabulous drone footage.

How GPS works? Trilateration explained