grid = key=master,group=grid,depth=1,widthcm=12,heightcm=18,gcell=5, \
       xmarg=0.2,ymarg=0.2,shrink=false,rounded=true,                \
       border_thickness=ultra thin,border_color=menublue,            \
       gback_color=gray99,gline_thickness=thin,gline_color=gray95
 
swarmpath = key=,group=,depth=100,begtime=0,endtime=0,nowtime=0
 
vessel = key=mainship,group=contact,depth=800,x=-9,y=13,hdg=0,     \
         body_type=kayak,length=4.2,wid_mbody=2.1,wid_stern=1.14,  \
         pct_mbody=0.5,line_color=black,line_thickness=ultra thin, \
         fill_color=gray90