During route planning, when do ECDIS automatic route checking features not function?

During route planning, when do ECDIS automatic route checking features not function?

• A. When using Vector Navigational Charts (VNC)
• B. When using Raster Navigational Charts (RNC)
• C. When in manual mode
• D. When GPS signal is lost

Answer: (B)

The automatic route checking features of ECDIS are primarily designed to work with Vector Navigational Charts (VNC). When using Raster Navigational Charts (RNC), these features may not function correctly due to the nature of raster charts, which are essentially images of paper charts. Raster charts do not provide the same level of navigational data and interactive functionality as vector charts, which can include detailed object attributes and information critical for route checking. In contrast, the other choices highlight situations where the functionality of automatic route checking may be diminished but not entirely negated. For instance, using RNC may limit certain features, but it is primarily in the context of vector charts that these automatic checks can be fully utilized. In manual mode and during GPS signal loss, the system may not perform automated checks as effectively, but it does not imply a complete failure of the route checking; rather, it alters the mode of interaction with the ECDIS.

The automatic route checking features of ECDIS are primarily designed to work with Vector Navigational Charts (VNC). When using Raster Navigational Charts (RNC), these features may not function correctly due to the nature of raster charts, which are essentially images of paper charts. Raster charts do not provide the same level of navigational data and interactive functionality as vector charts, which can include detailed object attributes and information critical for route checking.

In contrast, the other choices highlight situations where the functionality of automatic route checking may be diminished but not entirely negated. For instance, using RNC may limit certain features, but it is primarily in the context of vector charts that these automatic checks can be fully utilized. In manual mode and during GPS signal loss, the system may not perform automated checks as effectively, but it does not imply a complete failure of the route checking; rather, it alters the mode of interaction with the ECDIS.