Mark & Debbie Mueller
The horizontal orientation was primarily personal preference from the customary way companionway hatches have traditionally been fabricated; when they had to be removed and stowed. Also, if someone was intent on breaking in the strength of the assembly is far stronger in the horizontal configuration. Discounting the inability to remove the hatch the Amel method of sliding the hatch down and leaving it in place is nice.
PS - The authorities announced yesterday the overturned car carrier at St. Simons is going to be sectioned and removed in pieces.
Brass Ring A54