Introducing: Viz Checker

# Introducing: Viz Checker G'day, fellow salt-water enthusiasts! Before we dive into our next deep-read exploration, I’ve got some incredibly exciting news to share from the Scubadownunder HQ.

As any diver knows, the "viz" lottery is a gamble we’ve all lost more times than we’d like to admit. You wake up at 5:00 am, haul 30kg of gear to Shellharbour or [Bare Island](https://www.scubadownunder.com/dive-sites/bare-island), only to find the "washing machine" is on full spin and the visibility is roughly the consistency of pea soup.

Well, we’ve been busy in the lab (and in the water) developing a tool to take the guesswork out of your surface interval.

## Introducing: The Viz Checker

### Science Backed Predictions for Your Next Descent

We’ve moved beyond staring at a grainy surf cam and hoping for the best. Our new **Viz Checker** provides a real time estimate of underwater visibility (in metres) specifically for Sydney’s unique coastline.

This isn't just a weather report; it’s a bespoke algorithmic model. We feed live oceanographic data into a system tuned for the specific orientation and bathymetry of each site. Here is how we calculate what you'll see before you even zip up your wetsuit:

### The Data Behind the Depth

To get an accurate reading, our model synthesises four critical environmental variables:

* **Swell Dynamics:** It’s not just about height. We look at **swell period**, those long-period pulses that reach deep into the water column to stir up benthos sediment. * **Pluviometry (Rainfall):** We track the last 48 hours of precipitation. Heavy rain introduces terrestrial runoff and tannins into our bays, particularly impacting sites near harbour mouths. * **Tidal Phase:** Depending on a site's orientation, an incoming tide often flushes in "clean" oceanic water, while an outgoing tide can pull sediment heavy water from the estuaries. * **Aeolian Factors (Wind):** We monitor speed and direction. Onshore winds don't just create surface chop; they push turbid surface layers toward the shore, drastically reducing clarity in the shallows.

### Reading the Gauge To make your pre-dive check seamless, we’ve categorised the results into a simple traffic-light system:

- 🟢 **Green** | **8m+**| Mint conditions. Bring the wide-angle lens - 🟡 **Yellow** | **4–7m** | Fair conditions. Great for macro photography and critter hunting - 🔴 **Red** | **Under 4m** | Murky. Perhaps a good day for a gear service instead

### Accuracy & The Power of Community

You'll notice two unique features on the dashboard:

- **Confidence %:** This indicates the density of real-time data streams currently available. The higher the percentage, the more robust the prediction. - **Community Tuned Badge:** This is where you come in. After your dive, you can submit your actual visibility reading. Our model compares your "boots-on-the-ground" (or fins-in-the-silt) report against its prediction, fine-tuning its accuracy over time. When you see this badge, it means the local dive community has helped "train" that specific site's algorithm.

> This feature is available for all SDU dive sites but we need your help and feedback to tune the model over time

[Check Dive Site Viz](https://www.scubadownunder.com/dive-sites?viz=true)