If it makes you feel any better, LoBlo, the size, mass, and speed of the target plays a large role in determining the length of the ship's wake.
A FFG under 10kts generates a very short wake, and at 5kts and slower practically no wake. A supertanker at 12kts or a large warship above 25kts generate extremely long wakes in game.
Wakehomers work, at least partially, by using a very short range high frequency sonar to detect bubbles left in the water in a ship's wake.
I would imagine that the four screws and and massive hull of a Nimitz class at 30kts would generate enough disturbance in the water to still be detectable 10-15 minutes after the ship had passed, maybe more, but that's only using heuristical thinking, I'm not absolulely certain.
In any case, the wakehoming behavior in the game always seemed fine to me (except that it can track submarines if the depth is the same depth as the submarine, which is crap, but can easily be taken out using a combinations of the database and doctrines).
Cheers,
David
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LW

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