Marinas should usually build a sunglass-led program with a focused reader component and enough capacity to support peak boating demand.
Readers
Keep a practical power range for charts, labels, phones, paperwork, and near work.
Sunglasses
Give more depth to proven outdoor styles and verified lens features that fit boating use.
Display size
Countertop works in compact marina stores. Floor works when the season and traffic support fuller sun variety and reader coverage.
What decides expansion
Track sun sell-through, reader-power gaps, peak-period stockouts, and reorders. Use the boating calendar to flex inventory depth.