ECDIS Core Functionalities

Chart Control
Ownship Centering
Area Object
Point Object
Measurement
Sensor Handling
AIS Target Display
Routing
Collision Avoidance

CPA/TCPA Calculation

CPA/TCPA Calculation is an ECDIS function used to compute the closest point of approach (CPA) and the time to reach it (TCPA) between your vessel and another target for collision risk assessment.

CPATCPA::calculate()

Dangerous Box Warning

Dangerous Box Warning is an ECDIS alert that triggers when an AIS target enters a predefined “danger box,” helping the navigator avoid unsafe CPA/TCPA situations.

CPATCPA::drawBox(Ais)