From Comics to Toons: Snuffy Smith & Barney Google in The Shipwreckers (1963)
Seems Snuffy Smith's never been on a ship before. So Barney Google arranges for Snuffy and Loweezie to take a boat ride on one of his uncle's ships. Unfortunately, being a fish out of water will only get Snuffy in trouble.
Here's "The Shipwreckers":
Paul Frees (Barney & Snuffy) recycled his Inspector Fenwick voice for the ship's captain, and would do so again for the Chief on Secret Squirrel 2 years after this short aired.