Frame Positions

In accordance with traditional shipbuilding practice a ship has a varying number of frames, each with an associated position along the x-axis. It is then possible to specify the x-position by for example, X=FR45 +100 or X=FR45 -150 which means positions 100 forward of and 150 aft of frame position 45, respectively.

The following rules apply to the frame numbering in AVEVA Marine.

• The frames must always be numeric, that means, they must not contain any letters. On the other hand they may be negative.

• The number of the frames should be in the range [-899,2766]

• The total number of frames is currently restricted to 500, unless the frames are consecutively numbered. In the latter case the frames may have numbers in the range [-99,500], that means, 600 in total.

• The relation between frame number and frame position may be quite arbitrary, for example, they may be increasing with increasing x-co-ordinates, decreasing with increasing x-co-ordinate or set without any specific order with relation to the frame position.

• The distance between frames may vary arbitrarily.

• The frame numbers and the corresponding positions are stored in a table, set up by the customer.

Remarks

• It is conventional in shipbuilding to locate frame number 0 at the aft perpendicular and to let the frames in the aft peak be identified by letters: A, B, C, The rules above do not allow this denomination. Recommendation: replace the letters by negative numbers (A--> -1, B--> -2, ).

• In some regions of the world it is customary to have numbered frames only at web frames and to identify intermediate frames by adding letters to the main frame number, for example, 56, 56A, 56B …., 57, 57A, 57B, … . Recommendation: Change this example to 56, 561, 562,…., 57, 571, 572, … (or to 560, 561, 562, …., 570, 571, 572, … ).