I already have most of my AB lines for my fields, but I need lines for the end rows.  I was planning on driving to the fields and marking them out. 

    Are there any websites where I can calculate the heading settings?  For example a heading of 180 degrees or 178.5555 degrees.  I could just enter the heading into the display.  That would save alot of time by not driving to all the fields.

Thanks in advance