choices=[ (u'', u'(Not filtered)') ] + [ (fn[1], fn[0]) for fn in list_areas() ] )
filter_sog_le = forms.FloatField(required=False, label=u'Only if speed ≤ (knots)')
filter_sog_ge = forms.FloatField(required=False, label=u'Only if speed ≥ (knots)')
choices=[ (u'', u'(Not filtered)') ] + [ (fn[1], fn[0]) for fn in list_areas() ] )
filter_sog_le = forms.FloatField(required=False, label=u'Only if speed ≤ (knots)')
filter_sog_ge = forms.FloatField(required=False, label=u'Only if speed ≥ (knots)')