unknown Navy rating? sleeve patch? from 1960's

[Der Finn]

This patch came with a group of ten '60's era nuclear submarine and destroyer patches; I've never seen one before. Have any of you members?

[Der Finn]

Reverse of same patch -

[ocsfollowme]

Here is a newer one that I found on the internet.

 

[Nuke_ET]

S1W and S1C were prototype naval reactors used for training at Nuclear Power Training Units (S1C in Windsor, CT, S1W in Idaho)

[Der Finn]

You guys are good! Thank you both for the prompt responses.