Intermediate Survey
An Intermediate Survey replaces one annual survey: the windows surround the second or third anniversary, rather than forming one continuous interval between them.
Operational Explanation
Separate the completion window from work that may be done earlier. HSSC section 4.3.1 allows additional cargo Safety Construction items beyond the annual scope to be performed between the second and third annual surveys. Do not apply this provision indiscriminately to IOPP or every certificate.
Regulatory Reference
IMO A.1207(34), HSSC 2025. Section 4.3 and certificate provisions: SOLAS I/10 for Safety Construction; MARPOL I/6 for IOPP. Safety Equipment uses the term periodical survey.
Scope of Application
Check certificate, thresholds and ship type. Ordinary windows are ±3 months from the second or third anniversary; passenger ships may have intermediate surveys for applicable environmental certificates despite annual renewal of their SOLAS safety certificate.
Procedure / How to Complete It
- Identify the certificate, anniversary date and survey due.
- Record window opening and closing and agree the programme.
- Prepare previous reports, modifications, maintenance and open defects.
- Arrange safe access and tests against the agreed scope.
- Check outcome, certificate endorsement and deadlines for required actions.
Practical Example
For IOPP with a 15 September anniversary, the second-year window runs from 15 June to 15 December; the alternative is the same window in year three. Month 30 lies between the windows: it is not an eligible midpoint.
What Typically Goes Wrong
Scheduling IOPP in month 30 as though the windows were continuous, or deferring every defect to the next survey without assessing severity and the assigned deadline.
Common Mistakes Mistake Library
| Mistake | How to avoid it |
|---|---|
| Scheduling IOPP in month 30 as though the windows were continuous, or deferring every defect to the next survey without assessing severity and the assigned deadline. | Check the individual ship’s requirements and documents before closing the work. |
What the PSCO Checks
Operational Tips
- Use a separate row for each certificate and survey.
- Assign each finding an owner and deadline.
- Retain completion evidence and endorsements.
Preparation checklist
- Certificate and survey identified
- Window checked
- Technical scope agreed
- Documents and access ready
- Outcome and findings recorded
FAQ
Related Topics
Last substantive revision of this page: 15 September 2026 · page fingerprint 861ebf71f9d5