Aquanaut Ltd

Underwater works, machine cleaning and polishing


Aquanaut Ltd is a professional diving company with more than 30 years of experience in the underwater services. We are a team of certified divers dedicated to quality underwater work. We can handle wide range of projects, from machine cleaning and polishing to underwater cutting and welding, from underwater surveys to rescue diving services, from certification of ships to cleaning of hulls, sea valve grating, sea chest, etc. We are certified by Germanisher Lloyd, Bureau Veritas (BV) and Bulgarian register of shipping (BRS).

Our experience, commitment to quality and professional diving equipment are the main reasons to choose us. We research each diving project carefully and provide its the best, safest and the most efficient solution.

The Company

The company is permitted and has a certificate from DNVGL – N AOSS0000CDZ-A0862217, and Bureau Veritas N LPR0/KKO/20210617152117 for underwater works and certification of ships and floating equipment.


Scope of Activities

  • Machine cleaning hulls overgrown with seaweed.
  • Machine polishing of the propeller.
  • Stern tube bandaging for seals replacement.
  • Release of the propeller from hawsers.
  • Cleaning of sea valve gratings, disassembling and mounting of grids.
  • Cleaning sea chest.
  • Unclogging and clogging of sea valve gratings and sea chests.
  • Plugging up of holes.
  • Underwater welding.
  • Underwater cutting.
  • Machine cleaning of ship propellers and ship steering gear.
  • Diver survey on ships.
  • Underwater surveys with or without video-shooting.
  • Rescue services and vessel lifting activities.
  • Underwater explosive works.

19 Kapitan Petko Voivoda Str. Varna 9000, Bulgaria


  • Technical and repair works of Bulgarian and foreign vessels
  • Excavating vessels sunk in the Danube and in artificial lakes
  • Repair, construction and installation works of water channel of "Rousse" power station
  • Underwater repair works of pump stations, water towers, artificial lakes in the country
  • Underwater repair works of AEC Kozloduj – cleaning of channels
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