Symbols

Question 1

Answer 1

Generic isolated danger mark, with LESS depth than the user selected contour or where the depth is unknown

Question 2

Answer 2

Sounding of low accuracy

Question 3

Answer 3

6s = all significant seafloor features detected, very high accuracy
5s = high accuracy
4s = uncharted features no expected, medium accuracy
3s = depth anomalies may be expected, low accuracy
2*s = large depth anomalies, poor quality
U = quality yet to be assessed

Question 4

Answer 4

Caution Area where a specific caution note applies

Question 5

Answer 5

Dredged area deeper than safety contour

Darker blue indicates water shallower than safety contour

Question 6

Answer 6

Vertical lines indicate areas of charted data at a significantly smaller scale than main display

Question 7

Answer 7

Indicates boundary between iala A and B

Question 8

Answer 8

Isolated Query indicates insufficient info to symbolize the feature

Query associated with symbol indicates absence of mandatory attribute such as beacon shape, direction, or orientation

Question 9

Answer 9

Boundary between ENC and non ENC data. Official vs. Unofficial vector chart

Question 10

Answer 10

Indicates additions info note or picture file is available

Question 11

Answer 11

Non tidal current

Question 12

Answer 12

Spring tide - Ebb (no fletching)
- Flood (fletching)

Question 13

Answer 13

Light Vessel/Light Float

Question 14

Answer 14

Daymarks

Question 15

Answer 15

New Object - Point
New Object - Line
New Object - Area

Question 16

Answer 16

Lateral Beacons -red/green

Question 17

Answer 17

Lateral Conical Buoys - red/green

Question 18

Answer 18

Lateral Can Buoys

Question 19

Answer 19

Cardinal Marks

Question 20

Answer 20

Isolated Danger

Question 21

Answer 21

Safe Water Buoy

Question 22

Answer 22

Special Marks

Question 23

Answer 23

Special Purpose Buoys

Question 24

Answer 24

Buoy - Mooring