You sure they were Chinooks? Navy never had them, because back in the day they had no rotor brake. You are thinking of the finest helicopter ever made, the CH-46 series.
Both helos were developed from the same late 50s prototype to meet service specific needs. Both are fine workhorse helos.
WWG1WGA
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)