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SN's Maritime Work & Rest Hours Control Software Conformity Certificate Granted By Lloyd's Register, LondonSN's Work & Rest Hours Control Software for ILO / MLC 2006 / STCW 2010 / CFR / OPA 90 / 46USC8104 + OCIMF Guidelines Method for   (Both Methods Certified By Lloyd's Register, London)

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This industry benchmark, customised software caters to the complex regulations under ILO, STCW, MLC 2006, 33CFR, OPA90. 46USC   Etc. 

With so many regulations in force (either running concurrently or partially excluded, dependent on the trading region), it is virtually impossible to manually calculate or even anticipate the violations that may ensue from a given pattern of work or rest over any given period.

New: Chilean administration amendment of MLC where the minimum longest period of rest is changed to 8 hours from 6 hours (With effect 01 April, 2022).  Refer to
5. Reemplázase el artículo 116 por el siguiente:


AA.  Though Flag States under whose domain, interpretation  is supreme, advisory or consultative bodies such as O.C.I.M.F. can, and do, differ in their interpretation of the international regulations.

After communication with the O.C.I.M.F. and Lloyd's Register, London, we have provided the user with the option to select from. 

  1. Convention Requirements Method
  2. O.C.I.M.F. Guidelines Method

O.C.I.M.F. and Lloyd's Register, London have (independently) checked the test case results and have approved the results as addressing the O.C.I.M.F. concerns.

After submission of the requisite documentation, we have obtained the amendment of the Conformity Certificate awarded by Lloyd's Register, London.

In this way, shipowners and Masters may with absolute confidence, choose from either method according to their circumstances.

BB.  Moreover, we have segregated the USA regulations into a drop-down combo box and the user can select the clauses to be applied, as required.

Customer testimonials ....
At Dole Reefership Marine Services, Ltd our vessels have been utilizing SN's WRH application for over 2 years now and can comfortably endorse it as one that surpasses any other software in the market addressing this requirement.

Vendor's support is par excellence, and the developer's willingness to customize the application while maintaining conformity to regulations is invaluable.

We encourage all maritime users of similar applications to migrate to SN's WRH for their fleet.

Dole Reefership Marine.     October 18, 2014
The SN’s WRH application is a simple and easy to use software to monitor the work and rest hours.

Very prompt and excellent customer and after sales service.

Capt. C Suthakaran MNI
Superin Chemical (S) Pte. Ltd.
We found your software easy and helpful to use.

It is able to support our Fleet to control crew rest hours onboard.

Hope your software more and more developed in future.

for Prime Shipping Corporation,
Owner and Tanker operator
I like your service, so I will use yr software.

Vu Dinh Huy (Peter)
Ref damaged hard disk in WRH PC, I would like to confirm that the WRHs software on Petrolimex14's computer is re-installed successfully with your kind support.

Thank you very much for your cooperation.

Khiet - Safety Dept of VITACO JSC
Please E-mail us your comments and we will post them here.

It is therefore, imperative that the users and evaluators have a friendly tool to enter the data and instantly see the warnings or violations.  The tool should as far as possible indicate the hour at which the violation occurs and the clauses affected.

Unlike competitor products where challenging computations for 3-day and 7-day routines are done just once a day, our software's computations are triggered throughout the period the crew is at work.  The software provides a comprehensive display of hours worked, hours rested, hours overtime with tabulated violations under various governing regulations - Confirmed violations are shown in red font.  Potential violations (clauses that are violated but whose STCW waivers are also not violated), are shown in pink.  Proportional violating results at the top and bottom where enough hours are not available are shown in violet.

Weekends are picked up from the PC calendar.  Holidays are picked up from table setup by user as per the CBA, in the yellow tabbed sheet.

We have provided an 'Hours Effected' sheet which shows the user at which hour+time the violation is caused and in which direction.  The user may select from 'Rest' regime or 'Work' regime. Also, the user can suspend MLC 2006 computations, thus allowing the STCW waiver rules to be considered.  In other words, with MLC check marked, STCW waivers are not considered and violation count is potentially increased. USA Clauses are computed only if the user marks that day with 'Y'. Similarly, relevant USA clauses are computed if marked if in port or at sea.

The STCW 2010 rule of minimum 1 hour or rest is incorporated into the coding.

Monthly data is saved to tiny compressed & encrypted files and can be retrieved at any time or sent by e-mail to the head office for their reference / records thus saving paper.

Data entered in 'Hours' page is exported to reports patterned on the 'MODEL FORMAT FOR RECORD OF HOURS OF REST OF SEAFARERS'.

With version 2.01 and onwards we have provided the facility for the user to specify an international date line crossing in either direction.  A day is repeated if the vessel goes from East to West and a day is skipped if the vessel crosses the date line from West to East.

With version 3.01 and onwards we have provided multi-language support for the reports pages.

In the Excel project, you can hover the mouse over the red corners to read some help by way of pop up 'tool tips'

Online Help File

Download Help File

Download Brochure     Flyer

Download Presentation

Languages supported at the moment in addition to the default English -

Arabic, Bulgarian, Chinese, Croatian, Czech, Danish, Dutch, Filipino, Finnish, French, German, Greek, Hindi, Hebrew, Italian, Japanese, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish, Ukrainian & Vietnamese


We will be improving upon the existing translations and adding new languages from time to time (as and when reports from third party translations services come in) or sooner, if requested to do so by any shipping company.

In a nutshell:

  1. The product has been awarded the Software Conformity Certificate by Lloyd's Register, London as compliant with all current regulations under ILO 180 / MLC 2006 / STCW 2010 / OPA 90 / 33 CFR & 46 USC 8104.  Additionally compliant with the O.C.I.M.F. Guidelines Method.  The new version has been uploaded.

  2. On-the-fly, computed results show the user and superintendent, in an instant, the status for compliance/non-compliance of the working hours v/s the regulations.  The hour at which the violation occurs and the relevant clause is displayed.

  3. The results are exported to reports designed as per the model format.  The header sections of these reports will be customised according to the purchaser's SMS documentation. (Logo and reference numbers, etc.)

  4. Password access with different rights for different users (Master, Crew, Office users).

  5. Multi-language support, as mandated a requirement by international regulations.

  6. Provision for entering a date line crossing in either direction.

  7. Records are stored in a database allowing for intelligent filtering.

  8. Sensitive data is encrypted.

  9. The Master can assign image files of signature of each crew member.  Scanned signature images are printed only at the Office.

  10. Records to be sent to the head office are encrypted and compressed.  These small size encrypted text files are e-mailed to the head office and imported there by a simple button click. Summaries and data can be sent automatically if desired by the office.  Import of data into the office database achieved with a single click.

  11. Superintendents perusing these imported records can do a comparative analysis on a chart.

  12. Special export functions for office users. Please contact us for a temporary license to evaluate these features.
  13. This tool is used not just for reporting but for planning the working hours of individual crew.


SN's Maritime Work & Rest Hours Control Software Conformity Certificate Granted By Lloyd's Register, London -Mmanagement Level Information




It must be noted that a ship may be detained if conditions are violated.

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