Creating a general log sheet for CTD and ADCP for fieldwork
This answer might be a bit late but here are some common metadata variables that get recorded:

For a CTD:


Operator 
Date and time
Start and end co-ordinates of station 
Station Number 
Sample depths (assuming you'll also be collecting water samples)


Here you can also record what the water samples are used for i.e. salinities, chemistry etc

Sea state
Vessel
File name


For the ADCP:


Start and end co-ordinates
Date and time
ADCP type
Set-up (sampling frequency, bin size)
Vessel
Operator
File name