1. A multilayer wiring board comprising:
a via that connects a plurality of inner layers; and
a ground layer that forms an outer layer distinct from the plurality of inner layers along a direction perpendicular to layer surfaces, the ground layer including a metal film formed to define a cut pattern where no metal film is present at a position facing the via, the cut pattern overlapping a first portion of the via while not overlapping a second portion of the via.
2. The multilayer wiring board according to claim 1, wherein the cut pattern has any one of a circular shape, an elliptical shape, and a rectangular shape.
3. The multilayer wiring board according to claim 2, wherein the cut pattern has any one of a letter-C- shape and an n-cut shape.
4. The multilayer wiring board according to claim 1, wherein the ground layer includes a through hole having a length of \u03bb4 along a signal line connected to the via.
5. The multilayer wiring board according to claim 4, wherein the through hole has any one of a rectangular shape, a protruding shape, and a taper shape.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A watercraft comprising:
a port propulsion unit and a port thrust controller axially aligned along a port side of the watercraft, the port propulsion unit having a fluid inlet and outlet;
the port thrust controller having an inlet and an outlet, the inlet in fluid communication with the outlet of the port propulsion unit and the outlet of the port thrust controller positioned proximate a port rudder on a stem of the watercraft;
the port thrust controller having a bypass thruster with an amidships outlet aligned generally normal to the port side of the watercraft;
a starboard propulsion unit and a starboard thrust controller axially aligned along a starboard side of the watercraft, the starboard propulsion unit having a fluid inlet and outlet;
the starboard thrust controller having an inlet and an outlet, the inlet in fluid communication with the outlet of the starboard propulsion unit and the outlet of the starboard thrust controller positioned proximate a rudder on a starboard rudder on a stem of the watercraft; and
the starboard thrust controller having a bypass thruster with an amidships outlet aligned generally normal to the starboard of the watercraft.
2. The watercraft of claim 1 further including:
a port turning plane connected to an outside port hull of the watercraft proximate the amidships outlet of the port bypass thruster to direct fluid from the port bypass thruster and
a starboard turning plane connected to an outside hull of the watercraft proximate the amidships outlet of the starboard bypass thruster to direct fluid flow from the starboard bypass thruster.
3. The watercraft of claim 1 wherein the port thrust controller comprises:
a body defining an flow passageway in fluid communication with the fluid inlet and the outlet, the fluid inlet also in fluid communication with the bypass thruster inlet and the amidships outlet;
a removable flow diffuser in a receptacle in the body, the flow diffuser having a flow diffuser inlet in fluid communication with the bypass inlet and a flow diffuser outlet in fluid communication with the bypass outlet;
a movable valve element sized and arranged to alternatively engage and seal against a primary valve seat and a bypass valve seat;
a support extending from the body to position the movable valve element in the flow passageway;
the removable flow diffuser aligned generally transverse to the flow passageway; and
means to move the movable valve element from an open position to direct all the thrust to the outlet, to a closed position to direct all the thrust to the bypass outlet and various intermediate positions to direct some of the thrust to the outlet and some to the bypass outlet.