We have a lone cricket aboard and we don't know where it made it's chirping camp. I called him Mr. Cricket, short for Mystery Cricket.
We both had our faces right up in the area where the sound is coming from, but the closer you are the harder it is to tell what direction the chirp is from because of high frequencies and the tambre that revibrates around the boat and reflects off the steel.
I even emptied the whole locker full of stuff I didn't know was there to no avail.