NAV 6 Midterm

Question 1

represent lines connecting points of equal depth below the water surface

Answer 1

Depth Contours

Question 2

indicates the depth below a vessel could run aground and it is equal to vessel’s maximum static draft

Answer 2

Shallow Contour

Question 3

calculated same as per Safety depth and activates alarm when depth is less

Answer 3

Safety Contour

Question 4

indicates the limit of sea area where shallow water effects occur that can affect a vessel

Answer 4

Deep Contour

Question 5

provide information on the direction and strength of the tidal flow

Answer 5

Tidal Currents

Question 6

help mariners visually confirm their position, avoid hazards, and navigate safely through channels or busy shipping routes

Answer 6

Navigational Aids

Question 7

used as reference points for coastal navigation and for positioning purposes

Answer 7

Coastline & Landmarks

Question 8

allows mariners to avoid dangerous areas where their vessel might run aground or collide with underwater objects

Answer 8

Obstructions & Hazards

Question 9

this data helps prevent collisions and ensures smooth traffic flow in congested or restricted waters, such as major sea routes and straits

Answer 9

Traffic Separation Schemes (TSS) & Shipping Routes

Question 10

critical for vessels with large masts or structures that need to ensure safe passage under bridges and overhead wires

Answer 10

Chart Datum & Vertical Clearances

Question 11

the reference level for depth measurements

Answer 11

Chart Datum

Question 12

include information which can assist in anchoring decisions

Answer 12

Seabed Composition

Question 13

includes tide tables or water level variations allowing mariners to anticipate changes in water depth

Answer 13

Tides & Water Levels