Here's a breakdown:
Has departed:
* Present Perfect Tense: This tense is used to describe an action that happened in the past and has a connection to the present.
* Example: "The train has departed." (The train left recently and is no longer at the station.)
Had departed:
* Past Perfect Tense: This tense is used to describe an action that happened before another action in the past.
* Example: "The train had departed before we arrived at the station." (The train left earlier and was gone by the time we got there.)
In summary:
* Use has departed to describe a recent departure that is still relevant now.
* Use had departed to describe a past departure that happened before another event in the past.