What IS this fitting?

David Kurtz

While trying to locate the source of water coming into my forward bilge (still looking) I ran across this deck fitting just in front of my windlass on my SM2000.  I’ve stared at it long enough to know that I am going to need some help figuring out what this is for.  It looks like an original factory fitting.  Beyond that… no clue.  Thanks in advance for your help!

Dave Kurtz
SM2 #380
S/V Celtic Cross

Detroit, Michigan

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