I have struggled with whether to bring binoculars on a cruise. We never have, but plan to on the next one.
I have a larger pair of Nikon binoculars I use at home (rarely) to view wildlife on my property, but I recently bought a small Leupold pair that I plan to bring on our next voyage in November.
I expect to keep them on the balcony, not while on an excursion, but we'll see. They are lightweight enough that throwing them in a bag won't be overwhelming.