AIS PLBs also have a battery shelf life of about 5 years and an operational life of a minimum of 24 hours
When this happens it is best to replace the line

Be sure this is your exact year, make and model boat, because this cover is subject to a 35% restocking fee , 1/4" Stretch Cord in hem ( NO Snaps or Clips ) pulls cover tightly under your rub rail, TRAILERABLE at reasonable highway speeds when cinched tightly with (12) FREE Heavy Duty TIE-DOWN STRAPS (6 on smaller covers) connected to the Sturdy TIE-DOWN-LOOPS (every 2 feet, double sewn in an offset " V " for strength), Can also be used on a drive-on FLOAT, DRY-STACK, SEA-PEN or IN-WATER (Not on a LIFT) with optional Sand Bags (below), but there are NO openings for lines to your cleats, Offered in three solution dyed fabrics (rather than just dyed on the surface, to reduce fading), Tis cover is DOUBLE-STITCHED using weather resistant anti-wick thread and FOLDED FOUR-PLY JOIN SEAMS (no raw edges) for added strength and durability, A MOTOR COVER is sewn into outboard model boat covers (some have separate motor cover), Ships in a sturdy 19x12x12 (up to 14 foot), 22x14x13 (14.5-19 foot), 25x16x16 (19.5-21 foot) or 27x18x18 (over 21 foot) box weighing approximately ( 1.1 X the length of the boat ) in pounds

Its a super handy tool, as its easy to lay fish flat to measure on it and just as easy to read thanks to its larger lines and numbers