Trap 4: The welin davids and chocks must be altered considerably; Werft-Reederei-Hafen 1924 offers detailed sketches, though. Make sure that two types of davids are used (cf. WRH)
Trap 5: Construct the skylights anew; Mr Otten drew them by hand so they are very wobbly; I drew them in scale 4:1 in detail and then reduced the size on the copier so that they fit to the deck space.
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