What is this telling you!

Mast Power Aerial

Mast Phone Aerial

Mast Phone Area booster

Rock, height that covers and uncovers below CD

Rock that is uncover.

Rock that is covered.

Underwater rock over which depth is known and not considered  dangerous to navigation

Underwater rock considered  dangerous to navigation

Rock considered  dangerous to navigation

Wreck of which the masts only are visible at MHWS

Wreck of which the masts are always visible.

Wreck of which the masts are visible at HAT

Wreck considered Dangerous to surface navigation

Wreck Depth Unknown , safe surface navigation

Wreck Depth known considered Dangerous to surface navigation

Trot, (Super buoys), mooring buoys , berth numbers

Super buoys, mooring buoys

Trot, (Super buoys), ground tackle and berth numbers.

Boarder Patrol traffic lanes.

Sea bed pipe lines with country of origin marked.

Sea bed power lines with country of origin marked.

Hill with trees

Hill with Evergreen ( except conifer) trees

Hill with Mobile phone aerials shaped as trees.

Mooring buoy , Large ships.

Racing buoys , letters to help identifies course.

Oil rigs

Large tower , identifiable on AIS as Racon T

Large tower , with racon T and identifiable on AIS

Large tower , identified as AIS Racon T

Traffic separation schemes with roundabouts

Traffic separation schemes without defined end-limits

Two way route with one way sections.