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Raymarine forum / Raymarine Forums / Instruments v / [TG] [TG11] ST70 Speed Calibration

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[TG] [TG11] ST70 Speed Calibration
10-16-18, 06:07 AM (This post was last modified: 10-16-18 12:43 PM by Chuck - Raymarine - Moderator.)
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andrewlachlan Offline
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[TG11] ST70 Speed Calibration
I am having difficulty calibrating STW using an ST70 display. The speed transducer is Airmar and its connected to an iTC-5. I also have 2 x Axiom 7's in the network. In reading the ST70 manual it initially makes reference to starting the calibration at the lowest calibration speed of 2 KTS (Start Speed Calibration item 6). I did this and needed to use the maximum calibration factor of 2.0 but even then it was reading a little low. I then moved to 4KTS and needed to use a factor of 0.9. On For the 8KTS factor I motored at my maximum speed of 7.5KTS SOG but even when using a factor of 2.0 I could not get STW reading high enough. What might I be doing wrong?
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[TG11] ST70 Speed Calibration - andrewlachlan - 10-16-18 06:07 AM

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