Except for Signet. They are still a small company in Southern California building sailboat instruments. And they build a special knotmeter for us that is a perfect replacement for thousands of round instruments installed in early Catalinas. Most of the companies who built round instruments are now out of business. But our knotmeter is a great replacement for several reasons:

• Each unit is vigorously tested and must pass extensive quality control standards before it is shipped. All units come with a two-year factory warranty.
• Four small magnets in a paddlewheel transducer with four vanes begin to rotate at a very low speed threshold making for great light air sensitivity.
• Ideal for trimming your sails because it reads out to two decimal places.
• Speed trend indicators may be used for accurate sail trim adjustment.
• Select the log mode, calibration mode, or change the adjustable speed averaging constant with a simple front mounted switch.
• The 4-1/2" round case (5-1/2" bezel) was the largest in the industry and therefore will fill the bulkhead mounting hole of almost any instrument.
• The flush mount thru-hull creates minimal drag, however requires a countersink in the fiberglass.
• The 1.6" diameter thru-hull fitting will replace most companies' fittings making it easy to retrofit in place of your existing instrument.
• Red night lighting can be wired to your running light circuit for good night time visibility.

1) This flush transducer is only appropriate when replacing an existing flush transducer. A new transducer installation requires a custom tool to bevel the hole. That tool is no longer available. See alternatives that use an easier to install mushroom under May we also suggest below.

2) Confirm the diameter of your instrument housing, instrument bezel and thru-hull transducer by measuring to ensure an appropriate fit before ordering.

3) This is a special order item. A 50% nonrefundable deposit will be billed when your order for this item is accepted. The balance will be billed when the product ships. Signet instruments are not mass produced in China. They are made in California and bench tested individually for you in response to your order.

4) When you order a special order item it sets off a chain of events like Willie Wonka in the chocolate factory. Once you turn the valve the chocolate is coming down the pipe. If you then decide you want caramel, the chocolate is still going to come out of the pipe. We can't put the Chocolate back in the pipe, so someone is going to have to eat it, and it's not going to be us! Your order can't be canceled, returned, or magically changed into caramel, so please order carefully the first time!