Scientific Anglers Sonar Uniform Sink Fly Line

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Sink Rate
Line Weight
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  • The idea behind the graduated densities of the SONAR Uniform Sink sinking fly line is a brilliant one: instead of a single density that can sink at an uneven rate due to the fly, the front of the Uniform Sink lines sinks faster than the rear, all but guaranteeing a straight-line connection to the fly. In stillwater and lake fishing situations, this is a must-have, non-negotiable, fish-catching attribute.

    • Front of fly line sinks slightly faster than rear, ensuring straight-line sinking
    • Sink Rates:
      • Sink 2 = 1.75 “ 2.75 ips (5-7 wt.)
      • Sink 3 = 2.5 “ 3.5 ips (5-9 wt.)
      • Sink 4 = 4.0 “ 5.0 ips (5-9 wt.)
      • Sink 5 = 4.5 “ 6.0 ips (5-9 wt.)
    • Core:
      • 5-wt. = Monofilament
      • 6-7 wt. = Braided multifilament
    • SA ID “ SA SONAR US WF X & (X = line weight)  (& = sink rate)





  • Shipping:

    We ship all of our items via the United States Postal Service or FedEx and most items will go out within 48 hours of the order being received. If you have any special shipping questions or concerns please contact us. Our shipping rates are as follows and are subject to change without notice.

    Standard Domestic Shipping (USA)

    Item Value 
    Shipping Cost
    $0-49.99 $6
    $50+ Free

    Expedited Domestic Shipping (USA)

    Item Value 
    Shipping Cost
    Any order size $30

    Overnight Domestic Shipping (USA)

    Item Value 
    Shipping Cost
    Any order size $75

    International Shipping (Ex-USA)

    Item Value 
    Shipping Cost
    $50 and up $55

    Returns & Refunds: The Compleat Guarantee

    Our Compleat Guarantee offers a 7-day return period on all fly rods and a 30-day return window for all other tackle. Items returned during this period will recieve a full refund provided that they are in the same condition that they left our shop. Please note that the Compleat Guarantee does not cover custom items, special orders, items marked "final sale", or bamboo fly rods. Return shipping is the responsibility of the buyer.

    Other Terms

    For international orders, please note that any international customs duties (such as VAT, etc.) are the responsibility of the buyer. Connecticut residents must pay a 6.35% sales tax on all purchases.

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