Archaeologists from the City of David, Jerusalem, want your ideas

The function of these strange, V-shaped markings discovered near the Gihon Spring in the City of David (Jerusalem) has completely baffled archaeologists. Submit your ideas below for what you think they might be.
Rather than remaining secretive and aloof about the puzzling discovery near the Gihon Spring, the archaeologists and the City of David Foundation issued a press release with a rare request to the public for help in identifying these mysterious carvings from the City of David.
The response was overwhelming. Tens of thousands of people took to Facebook and reposted on other social media outlets to offer their suggestions about what the Gihon Spring markings could be—from a torture device or molds for smelting iron to a representation of mountains or the symbol for water.
But the code still hasn’t been cracked. Submit your ideas below and see if you can unlock the mystery of these ancient carvings.
Based on Strata, “Archaeologists Offer Public a Glimpse Behind the Curtain,” Biblical Archaeology Review, March/April 2012.
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what was discovered in the room behind and to the left of Dr. Eli Shukron? What is beyond the edge of the floor, in which the carvings are located, in front of him as well? This contextual setting might help provide further insight into its function. Where is it located in relation to geographically significant resources (springs, creeks, etc.)?
Check the recessed areas for microscopic remains of metal or wood. It was probably to help something stand or remain stable.
I am studying the idea that this may be some form of the Priestly Blessing, when inverted, the markings are similar to that of the hand gestures: v v
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I think it is farily clear that there is no code here at all, but rather the grooves are meant to keep in place a set of 3 specialized drafting compasses. The rectangular groove is likely for a kind of allen key to lock the radius of the compass. QED
I cannot begin to imagine what these markings indicate however the marking on the furthest right sure does look an awful lot like the marking above the so-called Jesus tomb entrance; just an observation!
It could be that these are markings (signatures) are test patterns of stone masons ?
Although King has the most accurate answer I presume…
I think it has something to do with ancient aliens.
Obviously stands for Aqua Viva.