Scientific Anglers Sonar Saltwater Intermediate Full Clear Fly Line

When fish won’t commit to surface flies, the Scientific Anglers Sonar Saltwater Intermediate Full Clear Fly Line gives you the perfect edge.

Designed with a slow-sinking, full-clear head, this line slips quietly beneath the surface film, delivering unmatched stealth for wary saltwater species cruising shallow flats.

With a sink rate of 1.25 inches per second, the Sonar Intermediate keeps flies riding just below the surface where fish can see them clearly, without the disturbance of a floating line. The clear construction dramatically reduces line visibility, making it ideal for pressured fish like bonefish, redfish, permit, and tarpon in clear, shallow water.

Built specifically for saltwater conditions, this line features Tropi-Core technology, ensuring it remains stiff, slick, and tangle-resistant in hot tropical climates. Whether you’re fishing skinny flats, shallow bays, or calm coastal waters, the Sonar Saltwater Intermediate delivers subtle presentations with total control.

Key Features:

• Slow intermediate sink rate (1.25 ips) keeps flies just below the surface
• Full-clear head for maximum stealth in clear, shallow water
• Engineered specifically for saltwater environments
• Tropi-Core technology stays stiff and slick in tropical heat
• Ideal for bonefish, redfish, permit, tarpon, and other flats species
• Weight-forward design for efficient casting and control

Q: What types of fly lines do you sell?
A: Drift Outfitters carries fly lines for every fishing style and species — from delicate trout presentations to heavy saltwater setups. You’ll find floating, sinking, and intermediate lines, along with specialty tapers for Euro nymphing, spey casting, and warmwater fishing.

Q: How do I choose the right fly line for my rod?
A: Match the line weight to your rod weight (for example, a 5wt line for a 5wt rod). The type of fishing you do matters too — floating lines are best for dry flies, while sinking or sink-tip lines are ideal for streamers or deep-water presentations.

Q: What’s the difference between weight-forward and double-taper lines?
A: Weight-forward (WF) lines have their weight in the front for easier casting and distance, making them the most popular choice for most anglers. Double-taper (DT) lines offer smoother roll casts and can be reversed for extended use — great for traditional or delicate presentations, however many weight forward lines also offer these benefits, making DT lines less popular.

Q: Which fly line brands do you carry?
A: We stock leading brands RIO, Scientific Anglers, Airflo, and more. Each brand offers premium coatings, slick finishes, and tapers designed for maximum performance in both fresh and saltwater.

Q: How do I clean and maintain my fly line?
A: Rinse your line with warm, soapy water and dry it with a soft cloth to remove dirt and buildup. Use a fly line cleaner or dressing periodically to restore slickness and extend its lifespan. Proper care keeps your line floating high and casting smoothly.

Q: How often should I replace my fly line?
A: With proper cleaning and care, most fly lines last several seasons. However, if your line begins to crack, lose buoyancy, or feel sticky, it’s time for a replacement to maintain casting performance.