Palau
Siaes Tunnel (Ulong)
- Max depth49 m
- CertificationOpen water / no overhead
Diving and fills
Dive here with
What it looks like
All 4 videos and posts
Videos and posts
From other divers, via YouTube, Instagram and Facebook. They only load when you click; after that, Google's or Meta's privacy rules apply.
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Other people's footage, not advice: how someone else dives here says nothing about what suits your team. Dive within your training.
The dive
Visibility is better on the incoming tide and worse on the outgoing tide.
Profile and sections
Visibility is better on the incoming tide and worse on the outgoing tide.
- Depth and profile
- A 90 m tunnel, open at both ends and with side windows. The entrance ceiling is at 35 m, the floor at 40 m; at the exit the floor slopes from ~49 m (160 ft) to ~24 m (80 ft).
- Configuration
- Deep, with daylight through the openings: recreational gear with a torch, within your no-deco time (estimate).
Who can dive where
- At least Open water / no overhead
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 49 m (trimix or deco may be needed)
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
Boat dive in the Ulong area with a local dive centre. Fish 'n Fins asks for Advanced Open Water at least and strongly recommends a deep diving specialty.
Around Siaes Tunnel (Ulong)
FillsNo fill station known nearby
Other sites2
Going to Palau with your team?
Marcel finds the sites that match your team's certifications.
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