Six Clanking Jaws

♬ The Cog is Dead - The Depths Below ♬

Named after the metal jaws of leviathans lurking in their residing region, Six Clanking Jaws (SCJ; Jaws) is a mobile iterator fully capable of functioning and traversing underwater. The can is smaller in size compared to the average iterator superstructure. In addition to the basic, essential equipment of an iterator, it also possesses passenger seats and several see-through windows in a designated area.

The initial purpose of SCJ was to maintain submerged structures, checking for corrosion as well as repairing or replacing damaged parts or assisting in doing so.

However, as innovative forms of entertainment proved potentially crucial to some Ancients' plans to achieve fulfillment in life, "visitors" started boarding the structure for none other than underwater cruises.

They appear to be obsessed with things that are considered horrifying or uncanny by the general public, possibly due to the adrenaline rushes (or the iterator equivalent of them) derived from fear-inducing experiences. 

Legend has it that this iterator wound up being destroyed by their own name sake (crushed at the jaws of leviathans), their metallic husk remaining in the depths.