Is that a Hovercraft in the Harbour?

An unusual site but its not the first time I've seen one ....I think it is probably the Environment agency taking advantage of a very low tide to take mud samples etc. Can anyone confirm this?

The Red Breasted Merganser is still here and has been throughout the summer

5 Wheatears on the Spit first thing this morning...this one choosing the hide as a lookout

Dunlin...one of many.

The very high spring tide pushed the waders off the islands and some came all along the shoreline in the harbour

A single Knot mingled in  with the Turnstones and Dunlin just next to the hide

...and one of the ever present Turnstones