map advice needed

[Niteowl84]

hey guys...i dont know if im having a little trouble or not but i have been following trevallys tutorial to the letter but something is not adding up for me...
can you guys check this for me to see if what im doing is correct...

REINACTMENT: (my position is at 209 all stop 25M depth)

Contact moving slow, closing, bearing 299 Long Range
( 299+209=503-360=148)

*20 min passes*

Contact moving fast, constant distance, bearing 341 Long Range
(341+209=550-360=190)

*20 min passes*

Contact moving fast, moving away, bearing 080, Long Range
(080+209=289)

est. speed at: over 30 knots?!?!?!

place x high up on second bearing line
paralell line on b3 placed on b2, paralell line on b1 placed on b2 x mark
mark both intersections
compass on b2 x, to intersect both points of intersection on B1 and B3
move that to b3 intersection mark
etc etc

kinda gave up when i noticed my target must have been driving a merchant vessel with warp speed capabilities lol is there something wrong with my soundguy or am i doing this wrong somewhere?

many thanks for your reply