You are playing shuffleboard on the deck of an ocean liner T

You are playing shuffleboard on the deck of an ocean liner. The ship is traveling in the direction N30

v1x=20*cos30=17.32
v1y=10
v2x=-15
v2y=0
disk relative to the surface of the water=V=((v1x-v2x)^2+(v1y+v2y)^2)

v=(2.32^2+10^2)=10.265 N76.93º E