The subaquatic sounds of the tidal Thames starting from Princes Stairs on the south bank of the Thames at the western edge of the Rotherhithe peninsula and drifting upstream towards Tower Bridge and the London Pool.
On a rising tide, the sounds of the river will be streamed from hydrophones and a mobile, Raspberry Pi-powered streambox drifting, with me, in my kayak.
We will likely hear an ensemble of mechanical and industrial sound, the creaking of ropes and chains for example, with the possibilty of insect stridulation, gaseous events, and even mammalian and fish interjections. 
The early hour would suggest relatively less active marine traffic but, in reality, the river never sleeps. As the tide will be rising it's possible that there may be more marine traffic on the move from their downstream, overnight moorings to upstream passenger embarkation points.

This link will take you to a previous ADrift commissioned for Thames21 in the summer of 2024. 
https://vimeo.com/985685152 where you can hear a piece composed from several locations around the Greenwich peninsula.

My streambox comprises a Pi Zero and IQ Audio card with a 3G transmitter powered via a rechargeable Anker Li-ion battery. The components live in a waterproof case which will sit on the deck of my kayak.

Using a pair of Aquabeat hydrophones I will dowse the sounds from beneath the waves as the city awakens.

Links:
The PLA charts of these reaches of the Thames
https://assets.pla.co.uk/hydrographic-services/charts/318msc.pdf
https://assets.pla.co.uk/hydrographic-services/charts/319msc.pdf

and the hydrophones I will be using
https://www.terranovapress.com/books/aquabeat-hydrophone