Some kind of See Sign (looks a bit after a birdscage?), as far as I know it holds a weatherstation plus a peak meter for the waterlevel. This one is from today while shooting on the Lotseninsel at the mouth of the Schlei / Schleimünde. Took the ferry while the weather was just great, perfect sky for long exposure, dry (almost) and promising. Once there the weather changed rapidly from heavy rain showers into exploding thunderstorms, back to sun and it was very windy. Wind was offshore and so the cloudmovement. Therefor the water very quiet, although the tide was pretty low. With westerly winds the Baltic Sea here simply runs dry.
I got all wet quite some times. For one time I had to seek shelter in the WC, really had to run with all my rig geared up and while hurrying I lost the Lee Foundation Kit completely with Big Stopper and ND grad plus the Adapterring, which somehow detached (guess I simply screwed it on the wrong way :P. Luckily I could easily find it when I headed back after the storm, laying somewhere in the sand, phew!! :)