What Actually Happens During a VDR Annual Performance Test (APT)?

Posted on August 1, 2025 by Global Tech

Let’s clear something up — a VDR APT isn’t a “quick test.” It’s a deep, class-approved audit of your ship’s most critical electronic record keeper.

So what is an APT, really?

The Annual Performance Test (APT) is a mandatory inspection of the Voyage Data Recorder, required under IMO regulations. It ensures your VDR is properly recording key data: position, speed, radar, ECDIS inputs, bridge audio, and more. It must be carried out:

  • Annually, within a ±3-month window of the last test
  • By a manufacturer-approved service provider
  • In line with flag state and classification society rules (like DNV, ABS, BV, IRS)

If you skip it — you risk detention, failed audits, or worse, data loss during an incident.

What Happens During the VDR APT?

Here's what Global Tech engineers typically inspect and verify during a VDR APT onboard:

  • Functional Check: Microphones, recording units, sensors, interfaces, and power supply.
  • Data Playback Test: Confirm that recorded data (including audio and NMEA inputs) can be retrieved and reviewed.
  • Battery & Capsule Inspection: Battery health check, expiry verification, and fixed capsule (float-free or non-float-free) condition.
  • Firmware/Software Updates: If required and approved by OEM.
  • Class & Flag Compliance Checklist: Documentation, logbook entries, serial numbers, and calibration.
  • Report Submission: APT certificate is issued and sent to the classification society, flag state, and vessel operator.

What Can Go Wrong If APT Isn’t Done Right?

  • Invalid VDR recording in case of incidents — makes investigations harder
  • Detention during Port State Control or Class survey
  • Missed warranty claims due to expired or poorly conducted APT
  • Unaware of faulty components like a non-working microphone or missing data feed

Why Choose Global Tech for VDR APT?

  • Certified by major class societies (DNV, ABS, BV, IRS, etc.)
  • Engineers trained by leading OEMs (Furuno, JRC, Danelec, Netwave)
  • We bring spares, backups, and know-how to avoid delays at port
  • We handle reports, submissions, and cross-checks

Bottom line? APT isn’t just paperwork. It’s protection — for your crew, your compliance, and your cargo.

We do VDR APTs across India, Singapore, UAE, Egypt, and more — on-time and onboard.

🛳️ Contact Global Tech

Final Word

APT isn’t just a compliance checkbox. It ensures safety, compliance, and peace of mind for your crew and cargo. Schedule your VDR APT today.