Marinas avoid dead eyewear inventory by concentrating duplicate depth behind proven sun styles and treating boating-season inventory as temporary when appropriate.
Sunglasses
Use actual sell-through to determine which styles and verified lens features deserve more stock.
Readers
Keep a focused power range for charts, labels, phones, and paperwork without duplicating every power equally.
Use seasonality deliberately
Add inventory before proven boating peaks and reduce the buffer afterward.
Review leftovers
Separate evergreen sun styles from seasonal inventory that should be reduced or not reordered.