Latest onboard boarding time?

[Poconolady]

With a 3:30 departure time out of Amsterdam, what will the latest boarding time be? Its too early to check in and book an arrival time, but not too early to be making other  travel reservations. Will arrive by Eurostar, not by air. Trying to decide to come in a day early or not.

TIA

[NevadaCruiser2023]

If you read your cruise docs, at least in the USA, 90 minutes prior to departure is the cut-off. 

[mom says]

Take a look at the Eurostar site for train times. I don't think it is reasonable to try to do this on the day of embarkation. Delays are certainly not unheard of. Plan on arriving in A'dam the evening before.

[SbbquilterUT]

Another thought - last year there was a salinity issue in the canal you sail out on and times were adjusted, we departed earlier than originally stated and were notified by email a couple days in advance.  I never miss a chance for a bit of play in Amsterdam so I would travel in early.