Which of the following must the electronic...

🔍 Key Concepts

• ECDIS performance standards (IMO) – what information must always be available on the display for safe navigation • Official ENC (Electronic Navigational Chart) content (IHO S-57/S-101) – what types of data are considered essential chart information • Difference between mandatory display layers and optional/selected layers on ECDIS

💭 Think About

• Ask yourself: which of these options (ferry routes, regulatory boundaries, hydrography) are considered core safety‑critical chart information that must be available on an official electronic chart? • Think about what an ENC is fundamentally built from: is it mainly the water and seabed features, the rules/limits in an area, or specific service routes? • Consider whether IMO/IHO would require ECDIS to support only one type of information, or if it must be capable of showing multiple categories that appear on official charts.

✅ Before You Answer

• Check what types of objects are defined as standard ENC content in IHO S‑57/S‑101 (hint: look at hydrographic features and area limits). • Verify from the IMO ECDIS Performance Standards what information is required to be displayed for safe navigation, especially regarding coastline, depth, dangers, and boundaries. • Confirm whether items like ferry routes and regulatory boundaries are represented as chart features on official ENCs, and whether ECDIS must be able to display all such chart objects.

Which of the following must the electronic chart of an ECDIS display, as required by IMO/IHO?

Ferry routes

Regulatory boundaries

Hydrography

All of the above

🔍 Key Concepts

💭 Think About

✅ Before You Answer