While calculating the ETAs, multiple factors are taken into consideration. These include:
● Distance between origin and destination
● The average speed of the vessel
● Number of Port of Calls
● Climate and weather conditions
● Time required to refill the fuel
● Port traffic and congestion
● Unforeseen emergencies, among others
Taking in the factors involved, you can calculate the estimated time of arrival by the
formula:
Estimated time of departure + Estimated time in transit = Estimated time of arrival (ETA)
ETA v/s ET
ETD can refer to two terms: Estimated time of departure and Estimated time of delivery. The estimated time of departure (ETD) is when the vessel is anticipated to depart from the origin port. Based on this, one can calculate the estimated arrival time (ETA).
The estimated time of delivery (ETD), on the other hand, is the time when the shipment is expected to be delivered at the final destination i.e. the consignee’s address. ETD is rarely estimated but planned according to the last-mile delivery operations. Do note that the estimated arrival time (ETA) refers to the final port of destination and not the consignee’s delivery address. Based on ETA, the estimated time of delivery is calculated.
Estimated time of departure (ETD) → Estimated time of arrival (ETA) → Estimated time
of delivery (ETD)
