Taking a boat ride to explore coral reefs and enjoy snorkeling is not merely a straightforward experience. At OnBird, we prioritize safety in all our operations. Many individuals may be unaware of the risks associated with open water activities, but our extensive experience over the past decade equips us with a deep understanding of these challenges. OnBird develops ourselves safety management with Open Water Safety Management System, featuring advanced weather and water condition prediction capabilities (Wave Level, Wave Direction, Current Strength, Underwater Visibility…).
Open Water Risks
For individuals who are less experienced in open water, snorkeling may appear to be a straightforward activity—simply taking a boat to coral reefs, jumping in, and enjoying the underwater scenery. However, based on OnBird’s observations and insights, the reality is far more complex. We have witnessed numerous serious accidents in Phu Quoc, highlighting the importance of possessing a thorough understanding of the local open waters at coral reefs. While one may approach the experience with enthusiasm, it is essential to prioritize safety awareness to ensure a secure and enjoyable adventure.

We would like to outline the significant risks that may arise if one is unfamiliar with the local open waters surrounding coral reefs while snorkeling and diving. It is essential not to underestimate the importance of open water safety management:
- Strongly Wavy Water: The wave levels can fluctuate significantly from hour to hour within a single day.
- Unfavorable Wave Direction: The direction of the waves often shifts hourly, exhibiting notable differences between morning and afternoon at a given location throughout the year.
- Strong Current: The strength of water currents can be unexpectedly powerful, with speeds ranging from 5 to 10 m/s, capable of sweeping individuals away in an instant. However, these currents are not consistently strong; there are periods when the water flows gently or not at all. What measures can we implement to avoid these hazardous conditions?
- Low Tide Level: During low tide at the coral reefs, snorkelers may face risks while exploring the area. There are specific reefs in Phu Quoc where it is possible to become stranded on the coral within just 30 minutes of the water’s descent.
- Low Underwater Visibility: Underwater visibility is influenced by water conditions. In Phu Quoc, underwater visibility typically ranges from 1 to 10 meters. However, during the dry season, visibility in South Phu Quoc can occasionally decrease to 1-2 meters, which may negatively impact snorkeling and diving experiences as well as it is difficult to navigate the direction at coral reefs.
OnBird’s Open Water Safety Management System, featuring Advanced Weather and Water Condition Prediction Capabilities (Wave Level, Wave Direction, Current Strength, Underwater Visibility)

You probably meet the same service in snorkeling & scuba diving: OnBird is capable of making high accurate forecast on water conditions for a given date within a year: underwater visibility, tide level, current strength. So what is OnBird safety management process?
- Water current strength: OnBird offers precise predictions of water current strength, helping us choose safe snorkeling times and spots, especially on days with strong currents. This feature highlights OnBird’s accuracy in forecasting water current changes to mitigate risks.
- Tide Level: Select snorkeling spots by considering reef depth.
- Wave Level: OnBird offers precise predictions for calm water time frames, as wave levels fluctuate hourly in open water, resulting in varying wave activity throughout the day based on observations. To prevent last-minute booking cancellations, OnBird issues severe weather warnings 7 to 10 days in advance. This proactive approach allows us to safely and effectively reschedule tours, ensuring the well-being of our clients.
- Underwater Visibility: OnBird offers precise predictions of underwater visibility changes, allowing users to choose optimal dates and times for activities. In Phu Quoc, visibility ranges from 1 to 10 meters, often varying significantly, contrasting with the often misleading clear depictions seen in movies online.
