simplevmg
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	#!/usr/bin/env python3

	import sys, datetime
	sys.path.append ('../lib')
	from router_v1 import *

	boat = Boat(43, 6)
	boat.polar = Polar('../polar/so36i.pol')
	boat.wind = Wind(90.0, 15.0)
	boat.wp = WayPoint(43.1, 6.1)

	boat.polar.boatSpeed2(55, 7)
	exit(0)
	vmg, twa, hdg, speed = boat.bestVmg()

	print(' WP Bearing:{0:.2f} Dist:{1:.2f} Nm'.format(boat.azimut, boat.dist))
	print(' TWS:{0:.2f}'.format(boat.wind.speed))
	print(' TWA:{0:.2f}'.format(twa))
	print(' Heading:{0:.2f}'.format(hdg))
	print(' boat speed:{0:.2f} Kts'.format(speed))
	print(' VMG:{0:.2f} Kts'.format(vmg))
	if vmg != 0 :
	print(' ETA:{0:.1f} sec = {1:.2f} h'.format(3600*boat.dist/vmg, boat.dist/vmg))