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Operating Modes
22
Using the Tactical Compass to Identify Wind Shifts
The following sequence shows how you would use the SC-1 to identify a lift while sailing upwind on port
tack. The boat in the example sails at 40° to the wind when trimmed using telltales.
1
Imagine the wind clocking 25° to the left, lifting you on port tack and causing your leeward jib
telltale to flutter. While real wind direction has changed by 25° the reference wind direction
stored on the SC-1 remains unchanged.
2
Re-trim according to your tell-tales. In doing this you will head up until your boats real heading to
wind is 40°, the same as it was before the wind shift. At this point your indicated heading to wind
will only be 15° though because the reference wind direction stored on the SC-1 will still be aligned
with the pre-shift wind direction.
3
Unlock the buttons and use the "+" button to increase your indicated heading back to its pre-shift
value. In doing so you will be realigning the reference wind direction stored on the SC-1 with the
actual wind direction. This will prepare you to spot the next wind shift.
Please Note: Since the same reference wind direction stored on the SC-1 is used for VMG mode and
tactical compass mode, updating the reference wind direction in response to wind shifts as illustrated
above has the added benefit of maintaining the accuracy of the SC-1's VMG calculations.
Summary of Contents for SC-1
Page 1: ...SC 1 Reference Manual Firmware Version 2 4F Full Functionality...
Page 40: ...Installing Control Center 37 3 Click Next...
Page 43: ...Installing Control Center 40 6 Select I accept click Next...
Page 44: ...Installing Control Center 41 7 Select Typical click Next...
Page 48: ...Installing Control Center 45 12 Enter User Name and Company Name Click Next...
Page 49: ...Installing Control Center 46 13 Select Typical click Next...
Page 50: ...Installing Control Center 47 14 Click Next 15 Click Continue Anyway...
Page 52: ...Installing Control Center 49 17 If prompted restart your computer Select Yes click Next...
Page 66: ...Using Control Center 63 3 Name the file and click on the Save button to complete the process...
Page 81: ...Index 78 W Wind Direction in Tactical Compass Mode 20 Wind Direction in VMG Mode 24...