Ronstan Series 25 Utility Block - Single - Swivel Shackle Head [RF573] Marine Plumbing & Ventilation Heave compensation eliminates the vertical

Heave compensation eliminates the vertical effects of wave action from sonar depth measurements

more defined fish targets and automatically filter out unwanted noise so you never miss the action below

Fits standard surface mounted ST60+ instruments

Again the Jabsco Macerator pump has the characteristics that lend themselves to this application

Ronstan Series 25 Utility Block - Single - Swivel Shackle Head [RF573] Marine Plumbing & Ventilation Heave compensation eliminates the verticalSeries 25 Utility Block Single Swivel Shackle Head Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase. Features: Lightweight durable construction Economical Maintenance free Applications: Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bunk adjusters, etc