Fishing Craft Technology

Practical 6 - Drawing of half breadth plan and body plan

1) Aim: To draw the half breadth plan.

Procedure:

• Draw a horizontal line parallel to the reference line and below the sheer plan (i.e. centre line).
• Draw the vertical lines from the different stations which are marked on the sheer plan to meet the centre line.
• With reference to the off set table readings locate the points on these vertical lines (say keel line).
• Draw a smooth curve by joining the above points.
• Similarly locate the points for WL – I, WL – II, WL – III, LWL, deck and sheer lines and draw the smooth curves.

2) Aim: To draw the Body Plan.

Procedure:

• Measure the distance between the centre line and keel line in half breadth plan (say station 9). Transfer the same distance from the centre line to the keel line in the sheer plan with the help of a divider.
• Similarly measure the distance between centre line to WL-I, WL-II etc. in the half breadth plan and transfer the same distances from centre line to WL-I, WL-II etc. in the sheer plan respectively.
• Draw the smooth curve by joining all these points.
• Draw the similar curve for different stations (Say 8,7,6, etc.).
• Mark forward side stations on right hand side of the centre line.
• Mark the aft side stations on left hand side of the centre line