x = 53, y = 50, rule = B3678/S34678
4bo$3b3o$bb5o$bob3obo$9o$9o$b7o$9o$oob3oboo$bbobobo$4bo$3b3o$3b3o$bb5o
$bb5o$b7o$bb5o$bb5o$4bo$4bo$4bo$3b3o$3b3o$bb5o$bb5o$3b3o$bb5o$bb5o$b7o
$b7o$bb5o$bbooboo10$15b3oboo$15b5obo5bobo4bo7bobobboobo$12b9o4b5o3bo6b
3obo5boo$bo5bo3bob8obb7o3boo6boboobbob3o$4ob4obb18oboboboo3bob6ob5o$bo
5bo3bob8obb7o3boo6boboobbob3o$12b9o4b5o3bo6b3obo5boo$15b5obo5bobo4bo7b
obobboobo$15b3oboo!
Period 40 ships collide to form a p4 oscillator, without destroying the
ship coming upwards.  This oscillator is off of the path of the surviving
ship, therebyu allowing further ships from below to pass by.  However,
further ships coming from the right are eaten by the oscillator.
Therefore, this provides a way for a ship to turn off multiple p40 streams.
David I. Bell, April 1997
