Final answer:
The term used to describe the formal recognition exchanged by two Navy ships when they meet is crossing the line ceremony. This ceremony is also known as the Shellback Ceremony.
Step-by-step explanation:
The term used to describe the formal recognition exchanged by two Navy ships when they meet is crossing the line ceremony. This ceremony is also known as the Shellback Ceremony. During this event, sailors who have previously crossed the equator (becoming a Shellback) initiate and welcome sailors who are crossing the equator for the first time (becoming a Pollywog).