1989 to 1990: Hull constructed for Soviet research vessel Okeanos.

1994: Bought by V-Ships for charter to Swan Hellenic.

1994-12-10: Launched.

1996-01-01: Owner registered as Atholl Shipping, managed by V-Ships.

1996-04-29: Maiden voyage.

1996-06-07: Christened in London.

2003-04: Charter to Swan Hellenic ends.

2003-05-01: Split charter: Saga Holidays May to November as Saga Pearl, Abercrombie & Kent's Explorer Voyages arm November to May as Explorer II.

2003-05-29: Named Saga Pearl.

2003-11-24: Named Explorer II.

2004-05-24: Named Saga Pearl.

2005-02-28: Named Explorer II.

2005-05-03: Chartered to Phoenix Reisen, Germany, and renamed Alexander von Humboldt.

2006-01-30: Named Explorer II