First Operational Nuclear-Powered Submarine
This page is the CodyCross answer for the clue below from Transport, Group 104, Puzzle 2.
Question is: First Operational Nuclear-Powered Submarine
and the answer is: NAUTILUS
Word Meaning:
NAUTILUS — A marine mollusc, of the family Nautilidae native to the Pacific Ocean and Indian Ocean, which has tentacles and a spiral shell with a series of air-filled chambers, of which Nautilus is the type genus.
Definitions from Wiktionary.