HISINGSBRON
Request for the bridge to be opened on VHF channel 9, call HISINGSBRON.
Northbound: Call at reporting point A and B.
Southbound: Call at reporting point C. 
Bridge signals:
FR		Bridge cannot be opened.
Iso R 4s		Bridge shall not be passed.
Iso W 4s		Requesting vessel is observed.
FW		Bridge about to be opened.
Iso G 4s		Bridge open, proceed.
Iso G 4s + Iso R 4s	Pass without bridge-opening.