Boards Covering Hatches - Problems with Water Ingress to Holds (1920s Steamer) - Page 3 - Ships Nostalgia
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Boards Covering Hatches - Problems with Water Ingress to Holds (1920s Steamer)

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Old 2nd June 2018, 05:48
calmseahk calmseahk is offline  
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It appears that the discussion has been well and truly exhausted. Nevertheless, the old tramps I sailed on (hungry hogarths) Baron boats were fitted with athwartships portable beams slotting into snugs along the port and starboard coamings. The beams had a very slight camber as did the forward and aft coamings. The hatch boards were fitted in place by hand, removal from the centre, and replacement from the coaming inwards to the centre. One older tarp was fitted over the top. a second newer tarp was tabled and placed on the first. Finally a good quality tarp was overlaid. Both the upper and lower tarps were tucked and a batten inserted, then wedged with the right angle of the wedge facing out and forward. Finally locking bars were connected under the coaming edges and the two sides connected at the centreline where they were tightened. I do not recall ever having an ingress of water into the space below.

The tweendeck had roller beams, again hatch boards were fitted as above and the whole area was flat but a small coaming still existed around the periphery of the hatchway.

On other vessels we had wooden slabs fitted in place using the derricks. These were overlaid with tarps as described above.

On reefer vessels we had athwartship insulated beams in the tweendecks and heavy insulated plugs between them.

Its only after starting to sail on vessels with larger sized steel covers, water ingress became apparent, either across the crossjoint or along the channel bar sealing rubber . It seems these days that most ships have a fairly basic hatch cover system mainly hydraulic driven fore and aft or side opening by chains or wires.

In any system whether hatchboards and tarps or steel covers, if there is a gap, the weather will find it. If there is any fault in sealing and these days its a lack of maintenance, ingress can be expected.

One vessel I attended was carrying a log cargo over hatchcovers consisting of large pontoons, about five or sic covered the hatchway. There was a single useless tarpaulin laid across the top and held down by cargo netting. The cargo bounced several times in heavy weather, the pontoons collapsed and the hold was then flooded. The vessel was grounded to prevent the possibility of loss. Salvage was required.
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