One of nature's cruel tricks is that Carbon Monoxide is far better at bonding with Haemoglobin in Red Blood Cells than Oxygen is. 

Always have cylinders filled at reputable filling stations, check compressor s regularly and have properly located intake pipes. 

Learn more on one of my upcoming PADI Instructor Development Course dates. Book Now and Ignite Your Life today!

Because of the increased density of water sound travels approximately 4 times faster through water than through the air.

Every heard someone make a banging sound while diving? It almost always sounds like it's coming from above as the sound hits both ears at the same time causing you to instinctively look upwards.

Slack tide or 'the still of the tides' is when there is no movement in the tidal streams; it is neither ebbing or flooding. This can be a great time to dive as there is less water movement.

Hight tides are seen as preferable as they can make entries and exits simpler from shore and bring upwellings of clearer water. Perfect for budding photographers.

Learn more about dive planning on your PADI Divemaster program. Book Now and Ignite Your Life today!

Although the details for PADI Speciality Diver or Specialty Instructor ratings aren't listed in the PADI Instructor Manual, the fundamental information for these courses can be found in Key Standards found between Training Standards and Paperwork and Admin Procedures.

Want to learn more about living the dream as a PADI professional? Message me at This email address is being protected from spambots. You need JavaScript enabled to view it. for more details on how to get there and what to do once certified.

If a 'Fal-safe' regulator were to malfunction it would always do so in an open position. This means it will always give a continuous flow of air rather than cutting off the supply.

This is the reason we practice the Freeflow Regulator skill in the PADI Open Water Diver program.