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SHIPSWORLD

The picket ring — how the Big E sails with four escorts

Spectate view of USS Gettysburg from above and behind, a long grey warship with a helicopter on the stern deck and a pale wake streaming away across dark blue water.

Hornet Bay’s four escorts hold station in the carrier’s own frame: Gettysburg 2,400 m ahead, Nicholson and Stout 1,500 m out on the beams, Klakring 2,800 m astern. Here is how the ring stays together through a turn.

The Enterprise never steams alone, and the escorts are not scenery on rails. Each one is a small piece of station-keeping code chasing a point that moves with the carrier. Here is the geometry, straight from ships.js.

In the sim: the ring

How they hold it

Every station is stored in the carrier’s own frame (distance abeam, distance ahead), then rotated by her current heading each frame. When the Big E turns, the whole ring swings with her instead of sliding off sideways. Each escort steers for its slot and aims to arrive on the carrier’s heading.

The speed rule is three steps. More than 500 m off station, an escort sprints at its 12 m/s maximum. Between 80 and 500 m it runs at carrier speed plus up to 3.5 m/s. Inside 80 m it matches the carrier exactly. The carrier steams at 7.7 m/s, about 15 knots, so a straggler closes the gap at a few metres per second and then settles without hunting.

Why Klakring sits where she does

The air wing’s pattern ends at a final gate 3,000 m astern and 350 m off the centreline (see a day on the Big E). The frigate sits 2,800 m back, on the centreline. The approach course passes beside her stern, not through her, and the lookout in the groove has her wake to the side instead of a hull in the windscreen. The escorts themselves are introduced in the escorts report their names.

Try this

Launch from the deck, climb out, and press N for the tactical map. Count the four hulls, then watch them keep the same shape through a carrier turn. Or press J and spectate one: the Gettysburg is the one with the wake streaming behind it.

— HB