if not starNav then
	if not os.loadAPI("starNav") then
		error("could not load starNav API")
	end
end

local tArgs = {...}
if #tArgs == 3 or #tArgs == 4 then
	for i = 1, #tArgs do
		if tonumber(tArgs[i]) then
			tArgs[i] = tonumber(tArgs[i])
		else
			error("argument "..i.." must be a valid coordinate")
		end
	end
	print(starNav.goto(tArgs[1], tArgs[2], tArgs[3], tArgs[4]))
else
	error("arguments must be 3 or 4 numbers")
end