6 October 2026 · 3 min read
How to calculate your work experience as a mariner for an MBA application
Sea time and professional experience are not the same thing on an MBA application form. Four rules decide what counts, and most officers lose months on paper without realising it.
An application form asks for years of professional experience and assumes you have one employer, one start date and one continuous record. Our careers do not look like that. They are built from contracts, sign ons, sign offs, company changes and the gaps in between.
Admissions committees at ISB, the IIMs and schools like HEC Paris are not trying to catch you out. They simply do not know how a seagoing career is structured, so they apply their standard rules to it. Those rules have four consequences worth knowing before you fill in any form.
Rule 1: the clock starts at your degree, not your first ship
Your professional experience begins on the date printed on your degree certificate, whether that is a B.Sc. Nautical Science, a B.E. or B.Tech in Marine Engineering, or another qualifying degree. Sea time completed during pre-sea training or cadetship before that date does not count. Neither does a gap between graduating and joining your first employer.
This single rule is where cadet-heavy careers lose the most time on paper.
Rule 2: your first company is counted generously
With your first employer, count from your employment start date, or your graduation date if that is later, through to the sign off date of your last vessel with that company. This is treated as one continuous block. Leave, standby and gaps between contracts with that same first employer are absorbed into the total and still count.
Rule 3: every company after that is counted strictly
From the second employer onward, only the period from your first sign on date to your last sign off date with that company counts. An official joining date that predates actually boarding a vessel does not help you the way it did with your first employer.
Rule 4: gaps between companies count for nothing
Any time between leaving one company and joining the next is excluded completely. That includes time spent studying for CoC exams, waiting for an assignment, personal leave, and visa, medical or documentation delays. This is the single biggest area where mariners lose experience on paper, and most people have no idea it is happening until they total it up.
A worked example
Here is a realistic timeline with the four rules applied to it. The shape of it will look familiar.
| Period | Duration | Counts? |
|---|---|---|
| 15 Jun 2021 to 31 Aug 2021 | 2 months, 16 days | No. Pre-employment |
| 1 Sep 2021 to 20 Mar 2024, ABC Shipping | 2 years, 6 months, 19 days | Yes, counted as one block |
| 21 Mar 2024 to 9 Jul 2024 | 3 months, 19 days | No. Gap between companies |
| 10 Jul 2024 to 5 Jan 2026, XYZ Maritime | 1 year, 5 months, 26 days | Yes |
Total counted experience: roughly four years. Enough to clear a typical three year MBA minimum comfortably. But note that just over six months disappeared into excluded gaps, which is the difference between eligible and not eligible for someone earlier in their career.
Five things to do now, not when you apply
- Ask for a corporate experience letter rather than a sea time letter. A letter written in employment language, with clear start and end dates, invites far fewer follow up questions from an admissions office.
- Keep a running spreadsheet of every contract: company, vessel, sign on and sign off dates. Do not rely on your CDC alone when a form asks you to total years.
- Collect experience letters with specific dates while you are still in contact with the company, not two years after you left.
- If career progression matters to you, treat long gaps between companies as a cost, because on paper that is exactly what they are.
- Check your actual degree conferral date against your academy passing out date. People confuse the two constantly, and only one of them starts your clock.
Planning your own move ashore?
Bring your CoC, sea time and budget to a consultation call, or send an enquiry and we'll reply as soon as we can.