What does "But you should check the departure board." mean in English for Spanish?

In English for Spanish, "But you should check the departure board." means:

Pero debería comprobar el panel de información.

Listen to "But you should check the departure board.": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 3, Level 3, Scene 9