Lashware - Lashing Software for Ships Officers and Marine Surveyors

Introduction:

Lashware™ is a web-based lashing calculation program for Ships Officers and Marine Surveyors. It is easily operated using either keyboard or mouse. Lashware™ complies with the latest UNECE standards and CSS Code (Annex 13) and can print to all standard printer types.

>>> The official address of program is: Lashware

Feature:

• Lashware is based on the calculation procedures outlined in Annex 13 to the IMO CSS Code.
• Web-based program responsive to all pc, notebook and smartphone
• There are 2 available packages: personal package & company package with 1 manager + 5 users

Benefit:

• No need to install
• Easy to use and manage
• Access everywhere by every devices

Advantage:

• Modern outline and design
• Cloud technology that enables user to save and share job to other easily.
• Manager can manage staff with company package

Special features of Lashware

Stack function:

The stack function is a function which is used to save the lashing calculation in a table called a stack. This makes it easy to compare various lashing arrangements. You may save the lashing calculations for more directions (e.g. forward and port) for the same cargo unit. The stack function makes it possible to gather necessary information about the lashing arrangement calculation on one page.

Stack buttons :

“Save to stack”: By pressing this button the present lashing input and results are saved to the stack table. “Clear last”: This button clear the last item stored in the stack. Press “Show stack” to view the stack contents. “Clear stack”: By pressing this button you clear the contents of the entire stack. “Show stack”: Shows the stack. The stack table will appear as below.

   Lashing software - Stack table

A result is “not OK” will be highlighted in red font Stack table functions:

Clear stack: to clear all stack in the table

        : Edit the stack

: Re-arrange the stack

         : Delete the stack

Program assumptions

The calculation of accelerations and evaluation of lashing arrangements is based on the method described in annex 13 to the CSS code. The following assumptions are directly quoted from the code: A vertical securing angle α greater than 60º will reduce the effectiveness of this particular securing device in respect of sliding of the unit. Disregarding of such devices from the balance of forces should be considered, unless the necessary load is gained by the imminent tendency to tipping or by a reliable pre-tensioning of the securing device and maintaining the pre-tension throughout the voyage. Any horizontal securing angle, i.e. deviation from the transverse direction should not exceed 30º, otherwise an exclusion of this securing device from the transverse sliding balance should be considered. LASHWARETM applies to lashing arrangements with vertical securing angles in the range according to table 5 in annex 13, i.e. -30º ≤ α ≤ 90º. Lashing angles outside this range may give corrupt results. In case such angle is given the program will give the following warning: α < -30° or α > 90° : Warning! Securing angle outside range stated in annex 13. The acceleration figures shown in table 3 in annex 13 are basis for the calculation of accelerations in LASHWARETM, and apply in principle to ships with 50 m ≤ L ≤ 200 m, 9 kn ≤ V ≤ 24 kn and B/GM ≥ 7. In LASHWARETM, however, the accelerations have been extrapolated by means of power series to apply for ships with L > 30 m, and speed up to 25 knots. The B/GM has been extrapolated to apply down to B/GM = 4. LASHWARETM does not calculate transverse accelerations if B/GM < 4. If input parameters are outside the applicable range, the following warnings will appear: L > 200 m : Warning! L > 200. Accelerations are extrapolated outside the range given in annex 13! B/GM < 7 : Warning! B/GM < 7. Accelerations are extrapolated outside the range given in annex 13! B/GM < 4 : Warning! B/GM < 4. Transverse accelerations are not calculated ! V > 25 kn: Warning! V > 25 kn. Accelerations are not calculated ! Explanation of variables is given in the Help-function in LASHWARETM. A complete explanation of variables involved and a full set of assumptions may be found in annex 13.