Scientific Anglers Sonar Stillwater Parabolic Sink Fly Line

A Sink Profile That Fishes the Whole Column

The Scientific Anglers Sonar Stillwater Parabolic Sink Fly Line sinks in a U-shaped profile – a Sink 3 running line, a Sink 5 belly and a Sink 3 tip – so the middle of the line rides deepest while the tip stays a touch higher. That shape searches a large slice of the water column in a single retrieve and keeps flies tracking level through the strike zone. It is built on Seamless Density construction for a smooth, hinge-free connection to the fly.

Scientific Anglers Sonar Stillwater Parabolic Sink Key Features

• U-shaped Sink 3 / Sink 5 / Sink 3 profile searches a wide band of the water column
• Seamless Density construction eliminates hinging for a straight-line connection to the fly
• Overweighted by two line sizes for long leaders and multiple flies
• 10-foot and 20-foot textured hang markers for precise depth counting and lift control
• Dark Green / Charcoal / Dark Green colour scheme

Best Used For

• Stillwater fishing where you want flies tracking level through the strike zone
• Searching a wide band of the column in a single retrieve when fish aren't pinned to one depth
• Long leaders and multi-fly rigs that call for smooth, hinge-free turnover

Technologies

• AST Plus – Advanced slickness additive that reduces friction, improves shootability and keeps the line performing longer.
• Welded Loops – Durable welded loops front and back for easy reliable loop-to-loop connections to backing and leaders.
• SA-ID – Printed line identification showing taper, weight and density for quick recognition.
• Sonar – Density-tuned sinking technology that delivers a smooth stable sink profile and consistent depth control through the retrieve.
• Seamless Density – Blended multi-density construction that transitions smoothly between sink rates, eliminates hinging and keeps a straight-line connection to the fly.
• Audible Reference Point (ARP) – Textured band that produces a feelable, audible click through the guides, marking the ideal overhang point for loading the cast.
• Braided Multifilament Core – Supple cold-water core that improves flotation, reduces memory and provides smooth stable casting.

Temperature Rating

• Cold / Moderate – 0°C to 25°C

Target Species

• Trout
• Yellowfish
• Bass
• Barbel
• Carp

Types of Flies

• Nymphs
• Streamers
• Woolly Buggers
• Stillwater Patterns

Line Chart

*Grain weight measured at first 9.1 m.