Thanks for those infos, Henning - finally some insight for me about these derricks!

Regards,
Denis

Details can be seen here : http://www.shipspotting.com/gallery/photo.php?lid=1971932#

Hi,
I should mention that moving the boom from one side to another was not sooo easy. If vessel was trimmed by stern the boom was basically falling "automaticlly" to the other side. The other way was a bit more tricky. If the boom was topped a bit to much the spanwires where pulling in the "wrong" direction. And it was possible to bent the boom. And this is what actually happened here. The crew managed to give the boom a nice curved shape :-)
The pic's where taken after the boom was straightened and refitted

Hi,
yes, the "correct" procedure was as follows.
1. top the boom until the hook was hanging over the hook resting place on the deckhouse.
2. lower the hook into his resting place. Which was also the position for the hook during seavoyage as the hook could be secured there. To secure the boom as well.
3. remove the blocks from the hooks
4. 1 block had to be attached to the boom at the lower part
5. 2nd block attached to the hook again but in a center position
6. attach a short wire to the hook and secure wire on the other side of the deckhouse
7. pull the boom with that hook to the other side
8. once done connect the hook and both blocks again.
9. for fast working and reduced capacity 1 block can stay at the boom and the second hook can be used in single mode.

Hi, Henning - thank you! But in such case the disconnected hook will be "behind" the derrick after it will be pointing in the opposite direction, unless you disconnect only one lower block from the hook & swing it, as well as another block+hook & only then connect them again.

Hi,

actually simple. You remove the lower blocks from the hook, top the boom , and swing the 2 blocks from fwd to aft or vice versa. On the other side the two lower blocks are connected again to the hook

Amazing series of the Stuelcken HLD close-ups!
What I still cant figure out is how they swing the hook from forward to aft? Could someone clarify it to me, please?

Regards,
Denis