ENCs should refer to which geodetic datum for accurate positioning?

ENCs should refer to which geodetic datum for accurate positioning?

• A. WGS 84
• B. GDA 94
• C. NAD 83
• D. AGD 66

Answer: (A)

The correct answer is WGS 84, which stands for the World Geodetic System of 1984. This geodetic datum is widely used for navigation and mapping purposes, particularly in electronic navigational systems like ECDIS. WGS 84 provides a global reference frame that is essential for accurate positioning, ensuring that coordinates are consistent across different systems and regions. This universal applicability makes WGS 84 the standard datum in the context of electronic charts, as it allows for effective integration of various types of spatial data and satellite navigation systems such as GPS. The other datums mentioned, while important in their specific regions or contexts, do not have the same level of global acceptance or recognition. GDA 94 is primarily used in Australia, NAD 83 is standard in North America, and AGD 66 was used in Australia prior to GDA 94. Each of these datums serves specific local requirements and does not provide the same comprehensive global reference as WGS 84, making it essential for international mariners to rely on WGS 84 for accurate navigation and positioning.

The correct answer is WGS 84, which stands for the World Geodetic System of 1984. This geodetic datum is widely used for navigation and mapping purposes, particularly in electronic navigational systems like ECDIS. WGS 84 provides a global reference frame that is essential for accurate positioning, ensuring that coordinates are consistent across different systems and regions. This universal applicability makes WGS 84 the standard datum in the context of electronic charts, as it allows for effective integration of various types of spatial data and satellite navigation systems such as GPS.

The other datums mentioned, while important in their specific regions or contexts, do not have the same level of global acceptance or recognition. GDA 94 is primarily used in Australia, NAD 83 is standard in North America, and AGD 66 was used in Australia prior to GDA 94. Each of these datums serves specific local requirements and does not provide the same comprehensive global reference as WGS 84, making it essential for international mariners to rely on WGS 84 for accurate navigation and positioning.