BWBV0005524
Geldig vanaf 30-12-1954
Artikel 44
Verdrag nopens een eenvormig stelsel voor de meting van zeeschepen
The dimensions measured on board shall be checked by means of control curves made, for instance, as indicated below (see Figure 61).
1. The tonnage length shall be set off, drawn to scale, on a horizontal line AB. The points of division of this length numbered from fore to aft shall be marked. At each point of division a line at right angles shall be drawn on which, on a suitable scale, there shall be set off the tonnage depth of the corresponding transverse section. The uppermost points of those depths are then connected by a curved line formed by a batten. The curved line c thus obtained is approximately equivalent to the sheer of the deck, if the top of double bottom or top line of ordinary floors is horizontal in the longitudinal direction. Should this curved line be regular and continuous, the various tonnage depths may be regarded as being accurate. The points of division of each depth shall be set off on each of the lines perpendicular to AB, on which the depths have been marked off. Horizontal lines shall be drawn through the points of division and on these lines half the breadths measured at the corresponding points of division shall be set off on the adopted scale. If the measurements have been taken accurately, the extreme points of the half-breadths will be connected by a regular curve; if this is not the case, the irregularities of the curve will show irregularities in the measurements.
2. (a) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a straight line or on a regular continuous curve, longitudinal curves of breadths of the same number will be drawn in the following way: starting from the base xy, distances equal to the half-breadths of the transverse sections are set off on vertical lines corresponding to those sections. If it is possible to connect the points corresponding to the breadths of the same numbers by lines forming regular curves, the accuracy of the measurements will be guaranteed.
(b) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a broken line, longitudinal curves situated in horizontal planes (water-lines) are drawn in the following way: a certain number of horizontal planes at an equal distance from each other (e.g., seven numbered from I to VII) shall be taken parallel to the line AB. To avoid confusion with the breadths of the transverse sections, these planes are only shown in the example (Figure 61) in the foremost and aftermost portions. Each horizontal section thus determined meets the transverse sections at points which can easily be found. For half-sections 3 and 7 they intersect respectively at points h, i, j, k, l, m and n, and h', i', j', k', l', m' and n'. The next step is to determine the distance hg, ig, jg . . . ng, h'g', i'g', j'g'. . . n'g' - i.e., the respective distances between each of the points h, i, j . . . n, and h', i', j'. . . n' and the middle lines of sections 3 and 7. These distances shall be set off in a horizontal plane starting, from a base xy parallel to AB, on lines at right angles to this base, corresponding to the various transverse sections; h, i, j, k, l, m and n, and h', i', j', k', l', m' and n', which are the extreme points of the distance set off, are thus obtained. The same shall be done in the case of the other sections. By joining the corresponding points h, i, j . . . n and h', i, j'. . . n', the curves representing the horizontal sections I, II, III... VII are obtained. If the measurement is accurate, the curves will be regular.
(a) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a straight line or on a regular continuous curve, longitudinal curves of breadths of the same number will be drawn in the following way: starting from the base xy, distances equal to the half-breadths of the transverse sections are set off on vertical lines corresponding to those sections. If it is possible to connect the points corresponding to the breadths of the same numbers by lines forming regular curves, the accuracy of the measurements will be guaranteed.
(b) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a broken line, longitudinal curves situated in horizontal planes (water-lines) are drawn in the following way: a certain number of horizontal planes at an equal distance from each other (e.g., seven numbered from I to VII) shall be taken parallel to the line AB. To avoid confusion with the breadths of the transverse sections, these planes are only shown in the example (Figure 61) in the foremost and aftermost portions. Each horizontal section thus determined meets the transverse sections at points which can easily be found. For half-sections 3 and 7 they intersect respectively at points h, i, j, k, l, m and n, and h', i', j', k', l', m' and n'. The next step is to determine the distance hg, ig, jg . . . ng, h'g', i'g', j'g'. . . n'g' - i.e., the respective distances between each of the points h, i, j . . . n, and h', i', j'. . . n' and the middle lines of sections 3 and 7. These distances shall be set off in a horizontal plane starting, from a base xy parallel to AB, on lines at right angles to this base, corresponding to the various transverse sections; h, i, j, k, l, m and n, and h', i', j', k', l', m' and n', which are the extreme points of the distance set off, are thus obtained. The same shall be done in the case of the other sections. By joining the corresponding points h, i, j . . . n and h', i, j'. . . n', the curves representing the horizontal sections I, II, III... VII are obtained. If the measurement is accurate, the curves will be regular.
3. On the vertical lines drawn at the points of division of the length, distances in proportion to the area of the sections should be set off to scale. The fact that the curve formed by the extreme points of these distances is regular will give an indication that the areas have been accurately measured and calculated. Errors will be shown by corresponding irregularities in the line of the curve.
4. The control curves not only provide an indispensable method of checking measurements and calculation; they also make it possible, if necessary, to reconstitute a transverse section, the measurement of which has been prevented by material obstacles.
In such cases, at the time of measurement, it is advisable to take two subsidiary transverse sections situated respectively forward and aft of the inaccessible section and as near as possible to it (see Article 22). These two subsidiary sections, together with the regular sections which it has been possible to determine, assist in the finding of the curves of the breadths of the same number, or the curves of the horizontal sections, as the case may be.
On the vertical line passing through the point of division of the non-measured transverse section shall be taken the distances between the base xy and the intersections of the vertical line with the curves (see lower part of Figure 61).
Such procedure may be followed both in the case mentioned under 2 (a) and under 2 (b) of this article, and will make it easy to establish the transverse section. If the method of using the curves of the breadths of the same number has been followed, the distances obtained will correspond to one-half of the real breadths of the section.
1. The tonnage length shall be set off, drawn to scale, on a horizontal line AB. The points of division of this length numbered from fore to aft shall be marked. At each point of division a line at right angles shall be drawn on which, on a suitable scale, there shall be set off the tonnage depth of the corresponding transverse section. The uppermost points of those depths are then connected by a curved line formed by a batten. The curved line c thus obtained is approximately equivalent to the sheer of the deck, if the top of double bottom or top line of ordinary floors is horizontal in the longitudinal direction. Should this curved line be regular and continuous, the various tonnage depths may be regarded as being accurate. The points of division of each depth shall be set off on each of the lines perpendicular to AB, on which the depths have been marked off. Horizontal lines shall be drawn through the points of division and on these lines half the breadths measured at the corresponding points of division shall be set off on the adopted scale. If the measurements have been taken accurately, the extreme points of the half-breadths will be connected by a regular curve; if this is not the case, the irregularities of the curve will show irregularities in the measurements.
2. (a) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a straight line or on a regular continuous curve, longitudinal curves of breadths of the same number will be drawn in the following way: starting from the base xy, distances equal to the half-breadths of the transverse sections are set off on vertical lines corresponding to those sections. If it is possible to connect the points corresponding to the breadths of the same numbers by lines forming regular curves, the accuracy of the measurements will be guaranteed.
(b) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a broken line, longitudinal curves situated in horizontal planes (water-lines) are drawn in the following way: a certain number of horizontal planes at an equal distance from each other (e.g., seven numbered from I to VII) shall be taken parallel to the line AB. To avoid confusion with the breadths of the transverse sections, these planes are only shown in the example (Figure 61) in the foremost and aftermost portions. Each horizontal section thus determined meets the transverse sections at points which can easily be found. For half-sections 3 and 7 they intersect respectively at points h, i, j, k, l, m and n, and h', i', j', k', l', m' and n'. The next step is to determine the distance hg, ig, jg . . . ng, h'g', i'g', j'g'. . . n'g' - i.e., the respective distances between each of the points h, i, j . . . n, and h', i', j'. . . n' and the middle lines of sections 3 and 7. These distances shall be set off in a horizontal plane starting, from a base xy parallel to AB, on lines at right angles to this base, corresponding to the various transverse sections; h, i, j, k, l, m and n, and h', i', j', k', l', m' and n', which are the extreme points of the distance set off, are thus obtained. The same shall be done in the case of the other sections. By joining the corresponding points h, i, j . . . n and h', i, j'. . . n', the curves representing the horizontal sections I, II, III... VII are obtained. If the measurement is accurate, the curves will be regular.
(a) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a straight line or on a regular continuous curve, longitudinal curves of breadths of the same number will be drawn in the following way: starting from the base xy, distances equal to the half-breadths of the transverse sections are set off on vertical lines corresponding to those sections. If it is possible to connect the points corresponding to the breadths of the same numbers by lines forming regular curves, the accuracy of the measurements will be guaranteed.
(b) In cases where the lowest points of the tonnage depths of the various transverse sections are situated on a broken line, longitudinal curves situated in horizontal planes (water-lines) are drawn in the following way: a certain number of horizontal planes at an equal distance from each other (e.g., seven numbered from I to VII) shall be taken parallel to the line AB. To avoid confusion with the breadths of the transverse sections, these planes are only shown in the example (Figure 61) in the foremost and aftermost portions. Each horizontal section thus determined meets the transverse sections at points which can easily be found. For half-sections 3 and 7 they intersect respectively at points h, i, j, k, l, m and n, and h', i', j', k', l', m' and n'. The next step is to determine the distance hg, ig, jg . . . ng, h'g', i'g', j'g'. . . n'g' - i.e., the respective distances between each of the points h, i, j . . . n, and h', i', j'. . . n' and the middle lines of sections 3 and 7. These distances shall be set off in a horizontal plane starting, from a base xy parallel to AB, on lines at right angles to this base, corresponding to the various transverse sections; h, i, j, k, l, m and n, and h', i', j', k', l', m' and n', which are the extreme points of the distance set off, are thus obtained. The same shall be done in the case of the other sections. By joining the corresponding points h, i, j . . . n and h', i, j'. . . n', the curves representing the horizontal sections I, II, III... VII are obtained. If the measurement is accurate, the curves will be regular.
3. On the vertical lines drawn at the points of division of the length, distances in proportion to the area of the sections should be set off to scale. The fact that the curve formed by the extreme points of these distances is regular will give an indication that the areas have been accurately measured and calculated. Errors will be shown by corresponding irregularities in the line of the curve.
4. The control curves not only provide an indispensable method of checking measurements and calculation; they also make it possible, if necessary, to reconstitute a transverse section, the measurement of which has been prevented by material obstacles.
In such cases, at the time of measurement, it is advisable to take two subsidiary transverse sections situated respectively forward and aft of the inaccessible section and as near as possible to it (see Article 22). These two subsidiary sections, together with the regular sections which it has been possible to determine, assist in the finding of the curves of the breadths of the same number, or the curves of the horizontal sections, as the case may be.
On the vertical line passing through the point of division of the non-measured transverse section shall be taken the distances between the base xy and the intersections of the vertical line with the curves (see lower part of Figure 61).
Such procedure may be followed both in the case mentioned under 2 (a) and under 2 (b) of this article, and will make it easy to establish the transverse section. If the method of using the curves of the breadths of the same number has been followed, the distances obtained will correspond to one-half of the real breadths of the section.
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- Art. 44
- Geldig vanaf
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- Geldend recht
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- BWBV0005524
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- wetten.overheid.nl