Fuel tank arrangement of a marine vessel

A marine vessel fuel tank arrangement, comprising:

• a fuel tank having a shell, wherein a top portion of the fuel tank has at least one recess extending inwardly from the shell, the at least one recess having a recess bottom and a recess side wall, wherein:
• a portion of the tank that does not have the at least one recess is the tank-proper;
• and
• the shell includes an inside shell surface and an outside shell surface, the outside shell surface defining an outer periphery of the tank and the inside shell surface defining an interior of the tank;
• a deep well pump having a riser leading to a drive motor, the deep well pump and a first portion of the riser being located within the interior of the tank;
• discharge connection instrumentation comprising plural pipeline connections and plural valves, the discharge connection instrumentation operatively connected to the riser;
• wherein:
• the discharge connection instrumentation, the drive motor, and a second portion of the riser are within the at least one recess and not within the interior of the tank;
• and
• a portion of the drive motor extends beyond the outer periphery of the tank-proper;
• wherein the interior of the tank is free of structures that would prevent fluid within the tank interior from making contact with the inside shell surface at the recess bottom;
• and
• wherein the recess side wall is provided with at least one opening configured to accommodate a spraying means pipeline.