society > travel > travel by water > vessel, ship, or boat > parts of vessels > other parts of body of vessel > [noun] > opening in side of vessel > cover of > fastening for (2)
shackle1627
A ring, clevis, or similar device, used for attaching or coupling, so as to leave some degree of… Nautical. A fastening for a port-hole; a…
port-bar1717
A piece of wood used to secure a porthole on a ship. (See quot. 1867.)