Lashing Design App (IMO CSS)

(3 customer reviews)




Spreadsheet for Lashing calculation as per IMO CSS (version without Stoppers)


This Excel app helps you to calculate the external forces acting on a cargo unit in longitudinal, transverse and vertical directions during sea transportation.
Furthermore, the app is calculating the restrain provided by soft lashing in different direction and assist you in calculating the required min lashing in order to secure the cargo for sea passage.

How to use?

The user is asked to provide input such as Ship’s particulars, cargo weight, stowage position, COG, information for the lashing etc.
The Input cells are highlighted in blue or yellow.
Additional information and guidelines for the different input required can be found in the guide sheet.


The acceleration figures shown in table 3 and table 4 in annex 13 are basis for the calculation of accelerations and apply in principle to ships with 50 m £ L £ 200 m, 9 kn £ V £ 24 kn and B/GM ≥ 7 ( CSS Code Annex 13 2011) or B/GM ≥ 3 (CSS Code Annex 13 2020). The formula for length/speed correction factor shall not be used for ships lengths less than 50m or more than 300m


1. IMO Code of safe practice for cargo stowage and securing 2011 Edition
2. MSC.1/Circ. 1623 Amendments to the code of safe practice for Cargo Stowage and Securing (CSS Code) 2020
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Additional information

License Type

3 reviews for Lashing Design App (IMO CSS)

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Based on 3 reviews
  1. Prashob Nair (verified owner)

    Product satisfactory. Scope for improvement on the interface

    • Team TheNavalArch (store manager)

      Thanks for the feedback. We will work on improving the interface for the next version

  2. MARIO NATTERO (verified owner)

    quite simple and efficient

  3. Brett (verified owner)

    Excellent after sales service, thanks Prem!

    • Team TheNavalArch (store manager)

      Thanks for the review Brett.

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FAQs on Products

Important: Our excel-based products work only on Windows machines, and not on Macs

System Requirements:

MS Excel 2013 and up

Windows 7 and up