Anchor
Anchor turns up in 2 fields: refractories, maritime. Here is what it means to the people in each one.
Anchor in refractories
Metal or ceramic tie welded to the shell to hold a monolithic lining in place.
A V-, Y- or U-shaped stainless steel rod, or a ceramic anchor brick hung from steel, attached to the furnace shell to key a castable or plastic lining to it. Metal anchors typically reach about two-thirds to three-quarters of the lining thickness, are spaced on a set grid and get tip caps or a coating so they can expand without cracking the refractory. The alloy, from 304 up to 310 or nickel alloys, is picked for the temperature at the tip.
"Half the anchors on that wall aren't welded all the way round, fix them before the castable goes in."
Anchor in maritime
A heavy device dropped to the seabed by a chain or cable to hold a vessel in place.
This heavy steel hook or weight digs into the sea bottom to prevent a ship from drifting due to wind or current. Most commercial vessels carry bower anchors at the bow and sometimes a stern anchor. The holding power comes primarily from the heavy chain lying flat on the seabed rather than just the flukes digging into the mud.
"Walk the port anchor out to the water line and stand by to let go."