Lanterna

Chart symbols quiz (INT 1)

Ten questions on the symbols and abbreviations of INT 1: wrecks, rocks, anchorages, lights and traffic separation schemes.

10 questions · answers explained · no sign-up

Question 1 of 10

What does this chart symbol mean?

Answers

Correct!Not quite. The answer is Dangerous wreck, depth unknown.

Dangerous wreck, depth unknown. A wreck of unknown depth that is considered dangerous to surface navigation. The dotted line is the danger line. (INT 1 K28)

Question 2 of 10

What does this chart symbol mean?

Answers

Correct!Not quite. The answer is Rock awash at chart datum.

Rock awash at chart datum. A rock whose top is at about the level of chart datum. (INT 1 K12)

Question 3 of 10

What does this chart symbol mean?

Answers

Correct!Not quite. The answer is Wreck, not dangerous to surface navigation.

Wreck, not dangerous to surface navigation. A wreck of unknown depth that is not considered dangerous to surface navigation – no danger line around it. (INT 1 K29)

Question 4 of 10

Which symbol shows: anchorage?

Answers

Correct!Not quite. The answer is Anchorage.

Anchorage. An anchorage. (INT 1 N10)

Question 5 of 10

What does this chart symbol mean?

Answers

Correct!Not quite. The answer is Limit of restricted area.

Limit of restricted area. The boundary of a restricted area: a magenta line with T-shaped marks. (INT 1 N2.1)

Question 6 of 10

Which symbol shows: overfalls, tide rips or races?

Answers

Correct!Not quite. The answer is Overfalls, tide rips or races.

Overfalls, tide rips or races. Overfalls, tide rips and races: broken, turbulent water. (INT 1 H44)

Question 7 of 10

What does this chart symbol mean?

Answers

Correct!Not quite. The answer is Established direction of traffic flow.

Established direction of traffic flow. In a traffic separation scheme, an outlined magenta arrow shows the established direction of traffic in a lane. (INT 1 M10)

Question 8 of 10

Which symbol shows: leading lights?

Answers

Correct!Not quite. The answer is Leading lights.

Leading lights. Two lights in line: the firm line is the leading line (the track to follow), with its true bearing. (INT 1 P20.1)

Question 9 of 10

Nature of the seabed: what does "S" mean on a chart?

Answers

Correct!Not quite. The answer is Sand.

INT 1 section J: S = sand. (INT 1 J)

Question 10 of 10

What does "LFl" mean in a light description?

Answers

Correct!Not quite. The answer is Long-flashing – a flash of at least 2 seconds.

LFl = long-flashing: a light whose flash is of not less than 2 seconds' duration. (INT 1 P10)

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