15m
    Southern Islands, Singapore
    Labrador Nature Reserve

    UNISON IV

    Best months: Jan–Mar

    Protected Area

    Labrador Nature Reserve

    Why dive here

    With 263+ marine species recorded in the area - including blue-spotted stingrays, dugongs, giant moray eels, seahorses and sea turtles - UNISON IV offers some of Southern Islands's richest wreck diving. Water ranges 28-31°C, warmest May, June, November.

    Best timeJan–Mar
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBlue-Spotted Stingrays, Dugongs, Giant Moray Eels, Seahorses and Sea Turtles · 263+ species recorded
    Water28-31°C · warmest May, June, November
    CharacterWreck dive · max 15m
    StandoutExceptional marine biodiversity

    The UNISON IV is our favourite local wreck, not because it’s a giant, but because it’s so… *there*. Sunk in 1990, this 70-meter motor vessel sits upright and largely intact, making for an incredibly atmospheric dive. We love dropping down onto the main deck, often with schooling fusiliers swirling above us like a silver curtain. You can still make out the superstructure, the bridge, even the mast reaching towards the surface – it's a proper ship shape. What really makes the UNISON IV shine is the life that’s colonised it. Every crevice seems to hold something. Look for batfish hovering lazily around the mast, and we’ve often found lionfish tucked into doorways. On a sunny day, the light filters through the upper sections, creating these fantastic shafts of light, almost theatrical. It’s a site that rewards multiple dives; you always spot something new, a different angle, another resident moray eel peeking from a porthole. It’s perfect for divers who appreciate history and the way the sea reclaims its own, offering plenty to explore without being overly challenging.

    Typical UNISON IV Dive Profile

    5m10m15mSafety Stop0m15m max~50 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today05:5017:5512h 5m daylightGolden hour 17:28

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    Conditions

    Ocean conditions, forecast and tides for UNISON IV

    UNISON IV Ocean Conditions

    Monthly averages for UNISON IV, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (1.18, 103.96) (8km away)

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    October Averages

    Sea Temperature

    30°C

    86°F · Range: 29.5–31.1°C

    Air Temperature

    27°C

    81°F

    Wind Speed

    4.07 m/s

    7.9 knots

    Atmospheric Pressure

    1009.8 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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