When you decide to come ashore, keep your license active and place it in a glass box with a small hammer and a sign that reads: "In case of job frustrations, loss or a-hole boss, break glass"
I kept mine up for some time. As a Class Surveyor, I could renew based on my job. About the time I shifted to Insurance work, the rules changed a bit. I did a couple of continuity renewals, but gave that up some time ago. But yeah, I hung on to mine "just in case" for some time. I still have mine framed. . . .