User Parameters Dialog - Axes Tab

The Origin panel is used to select the position of the origin for the X axis and it's positive direction. The origin can be at the aft perpendicular AP, fore perpendicular FP, Midships or at a user specified distance from the aft perpendicular X=. The positive axis direction can be Aft or Forward.

The Positive Y panel is used to specify the axis system. Select Port for a left-handed axis system or Starboard for a right-handed axis system. Select Symmetric to indicate that the design is symmetric and is only being modelled on one side of the centreline. In this case, only half the beam is shown in section and waterline views. Unselect the Symmetric checkbox to indicate that both port and starboard sides are to be modelled. In this case, the full beam is shown in section and waterline views.

The Stations panel is used to specify the station numbers at the AP and FP. There are no restrictions on station numbering.

The Frames panel is used to input or modify the table of frame spacings. The position of frame 0 relative to the origin is entered in the Frame 0 edit box. The frame number and the spacing forward of this frame are entered into the grid. Lines can be copied, pasted, inserted and deleted by clicking the Right Mouse button over the grid and selecting the appropriate option. The positive direction of the frames can be specified as Aft or Forward.