I looked further for Zeebrugge scenes with crane(s) and found another one of the same scene. There are at least two pictures of this busy scene in Zeebrugge, probably seperated by less than an hour. I tried to piece the puzzle together with two pictures, not knowing which was first and even not knowing how many other pieces there were [ 8 other pictures ? Or are these stills from a movie ? ]. The sequence may be as follows
Scene 1
In front is the prototype Friedrichshafen FF41A (Marine nummer
678) twin-engined torpedo carrying seaplane. Clearly can be seen its three-finned tail. There is a crew positioned in the neighbourhood of a float. No action there.
In the background left can be seen a Hansa-Brandenburg GW (Marinenummer
701). This is the version of the GW with a single fin and a slightly more rounded nose. A lot of people can be seen around this machine.
Scene 2
The second picture (hopefully labeled with a
handwritten 10) gives the same perspective but then 15 to 30 minutes later. A
Hansa-Brandenburg GW (Marinenummer
701) is hoisted up or down in the water. This is the version of the GW with a single fin and a slightly more rounded nose.
Behind the still motionless Friedrichshafen FF 41A prototype (no crew to be seen) has come another Hansa-Brandenburg GW (single fin and rounded nose, for the series 700-704). No action there either.
Behind this Hansa-Brandenburg can be seen a big single engined seaplane, most likely a Friedrichshafen.
Clearly can be seen that the Friedrichshafen FF41A is standing with its floats right on the concrete. It is not resting on wheels. Moving of the machine is only possible with the crane. The Hansa-Brandenburg behind the Friedrichshafen has wheels, so can be moved (with a lot of people).
Well this is what I could see on these two pictures. If there are eight missing (or even a movie), perhaps one of the forumites can contribute

, so it is possible to know what really happenend on that day at Zeebrugge. As the Hansa-Brandenburg GW (series 700-704) were produced between September 1916 and January 1917. The Friedrichshafen FF41A prototype was built about end 1916 / begin 1917, which would date this scene in Q1 / Q2 of 1917. It can be more precisely defined because it is known that Hansa-Brandenburg GW No.701 was delivered to the Austro-Hungarian Navy.
First picture is from Nowarra - Marine aircraft of the 1914-1918 war, 1966. I don't know where the other picture and the copy of the pictures in the German (gothic) book comes from.
Kees