Twenty minutes before a twelve-guest dinner the chef tells you the walk-in has been reading 11°C since some time this morning — nobody is sure when. The prawns, the chicken and the mousse are all in there. The principal has flown in guests specifically for tonight. The chef says it is "probably fine". This is the moment supervision exists for.
Due diligence: the defence, and what it actually is
In many jurisdictions a food business accused of an offence may raise a due diligence defence: that it took all reasonable precautions and exercised all due diligence to avoid the offence. The defence is not a feeling of having tried hard. It is evidence, created before the incident, that a competent system was operating.
| Claimed | Evidence that would actually support it |
|---|---|
| "We control temperature" | Signed monitoring records, calibration records, corrective actions taken and closed out |
| "Our crew are trained" | Certificates, induction records, refresher dates, coaching notes, competence sign-off |
| "Our suppliers are safe" | Approved-supplier list, supplier checks, delivery-acceptance records, traceability |
| "We manage allergens" | Allergen matrix, guest declaration form, verification against product labels |
| "We clean properly" | Cleaning schedule with what/how/who/how often, signed off, plus verification swabs or checks |
| "We reviewed the system" | Dated HACCP review after menu, crew or itinerary changes |
Records that are all signed in the same pen at the end of the week are worse than no records — they are evidence of a false system, and inspectors recognise them instantly.
The consequences of failure
- Illness — from a ruined charter to hospitalisation, medevac, and in vulnerable people death. Listeria in a pregnant guest, E. coli O157 in a child.
- Prosecution and fines — against the company, the captain, and potentially the supervisor personally.
- Detention or refusal of clearance by a port state; a health authority can close your galley.
- Charter cancellation and clawback of fees; loss of the guest, the broker and the crew's season.
- Reputational destruction — in a small industry, one norovirus outbreak follows a boat and a chief stew for years.
The authority to stop service
The supervisor must have — and must use — the authority to stop service, condemn food, or withdraw a dish without seeking permission first. Build it before you need it:
- Agree it with the captain in writing as part of the FSMS: who may stop service, and that they will be backed.
- Use a clear escalation: unsafe or unproven → do not serve → inform captain → record → correct → verify.
- When in doubt, throw it out. Food is cheap; an outbreak is not.
In the scenario above, the correct call is straightforward: food held above 8°C for an unknown period with no record is unproven, therefore unsafe. It goes in the bin, the menu changes, the fridge is fixed, and the whole thing is written down that night — because that record is your due diligence.
Onboard Notes
- Sign records when the check happens, never in a batch. Honest gaps beat pretty fiction.
- A stop-service call is much easier if the captain agreed the rule when nobody was hungry.
- Photograph faults and disposals. A dated photograph is powerful evidence.
Scope note: xplor is not an approved centre or an accredited training provider. This lesson is preparatory study only - no certificate and no regulated qualification is awarded here, and a Level 3 supervising food safety award must be sat and assessed with an approved centre of a regulated awarding organisation.