The deep water channel of Grimsby is well marked and the tall red bricked Victorian Dock Tower is an obvious land mark to make for by day and by night since the tower is flood lit. Once past the WW1 Bull Sand Fort, follow the line of red port hand buoys up to N0.6 Lower Burcom Buoy where you head for the Dock Tower until you see the Eastern Jetty, Iso.R.4s, - taking care of the build up of mud off the jetty. Access through the lock is ±2hrsHW and one should call the lock keeper on VHF Ch 74 call sign ‘Fish Dock Island’ for permission to enter the lock. There is also an IPTS traffic light system on the western side of the lock:
GREEN GREEN GREEN - safe passage
RED RED RED - no entry
It also possible to open the lock for an additional ±2hrHW outside the advertised hours, giving in effect a window of ±4hrsHW, but this will incur a £10 charge, collected by the lock keeper. Maintain fairly high revs through the lock to offset any turbulence and once through the lock, head for a cluster of four high rise residential tower blocks which over look the marina.