Judgment of the Court (Second Chamber) of 10 January 2006 in Case C-230/03: Reference for a preliminary ruling from the Bundesverwaltungsgericht Mehmet Sedef v Freie und Hansestadt Hamburg (EEC-Turkey Association — Freedom of movement for workers — Article 6 of Decision No 1/80 of the Association Council — Right to the extension of a residence permit — Conditions — Turkish national who was employed in the maritime shipping industry of a Member State for 15 years — Same employer for more than one year without interruption, but not up to the end of a period of three years — Periods of employment interrupted 17 times on account of the nature of the occupation)