Jurisdiction (Federal High Court)
Section 251(1)(g) · 1999 Constitution (2004 edition)
What Constitution says
(g) any admiralty jurisdiction, including shipping and navigation on the River Niger or River Benue and their affluents and on such other inland waterway as may be designated by any enactment to be an international waterway, all Federal ports, (including the constitution and powers of the ports authorities for Federal ports) and carriage by sea;
This is the 1999 Constitution as published in 2004. Later amendments aren't included yet, so a section may have changed since.
Original source
Official Gazette · CFRN 1999 official PDF · printed page 108–109. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections