NBM Dive Site Resource
UIT-23 (Reginaldo Giuliani) — Strait of Malacca
Offshore from Perak, Perak, Malaysia
HMS Tally-Ho sank the former Italian submarine Reginaldo Giuliani in February 1944. The Operation Dukedom expedition reported diving on the salvage-damaged wreck in November 2010.
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Featured Hero Photograph
Aquatic life at this dive site
What divers may encounter
Three reviewed connections are featured here. Sightings vary by season, conditions, and chance, so they are never guaranteed.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Site media
Photographs
Three views rotate from the published gallery on each visit.
Contributor media
Dive videos
Three featured video positions are reserved on every profile.Regional location and nearby land
Location map
Historical regional map with nearby land for orientation.Map data © OpenStreetMap contributors
Recent field observations
Diver-reported temperatures
Automatically checked observations from dives during the past 14 days. Three reports are visible at a time; scroll for more.A report that passes the automatic checks will appear here with the dive date, diver’s display name, and temperatures at each depth.
Reports are automatically checked for plausible dates, depths, and temperatures. They are observations, not forecasts; confirm conditions before diving.
Why divers know this place
Highlights
The Operation Dukedom dive diary records the team’s visit on November 12, 2010. The hull had already been broken apart by salvage.
Shipwreck-only module
The wreck
This section appears only on shipwreck records and brings the vessel, its loss, present condition, access, and responsible wreck-diving considerations into one place.
- Vessel type
- Liuzzi-class submarine, formerly Reginaldo Giuliani
- Year built
- 1939 (launched)
- Year sunk
- 1944
- Cause of loss
- Torpedoed by HMS Tally-Ho on February 14, 1944. The sources report 26 deaths and 14 survivors.
- Present condition
- A November 2010 expedition reported the hull had been broken apart by earlier salvage. Present conditions are unverified.
- Penetration guidance
- The diary documents the dive and salvage damage. Penetration is unverified.
Before you arrive
Access notes
The report records a 2010 visit. Current access, local jurisdiction, support and operating conditions are unverified. The map shows the historical loss region.
Plan within your training
Conditions and hazards
The expedition reported salvage-damaged remains. Present debris and water conditions are unverified.
Independent resource notice
This record is a starting point for independent verification. Access, closures, moorings, weather, currents, depth, visibility, operator availability, and site conditions can change without notice. Confirm current information with the responsible operator, property owner, managing authority, or another qualified local source before planning or attempting a dive.