Sunday, April 19, 2009

Frogfish - Bonaire



Quick post of a nice orange Frogfish perched on two branches of coral I managed to capture near the island of Klein Bonaire near Kralendijk, Bonaire, Netherlands Antilles.

If you look closely you can see the lure tucked back on his head. (Click picture for larger image)

When diving, Orange is the second color to loose resolution (remember the old adage for the colors of the Rainbow - "Roy G. Biv"). As you dive deeper, it is the same. The colors fade in sequence, red, orange, yellow, green, blue, indigo, violet.

A flashlight (or a camera strobe) will instantly restore the natural colors. Without a flash, this little guy has perfect camouflage and is almost impossible to detect.

The image below shows the same Frogfish without the benefit of a Camera strobe.








Sample SDI Pre- Dive Briefing

Dive Briefing

(Note - delete/shorten Briefing as necessary based on

Training and Conditions!!, to well - make it Brief!!)

Perform Accountability Check!!

Introduce Staff on Boat

Facilities at the Site
Boat Facilities
o Fire Extinguisher
o Remain seated while traveling & mooring
o Marine Radio
o GPS
o Fire Extinguisher
o First Aid Kit
o DAN Oxygen on-board – certified to use

Area in which the diving will occur

Mooring Line Location
History of Site & UW features
Silty Bottom conditions?
Describe the dive site
o Depth to bottom
o Visibility
o Temperature

Profile
Computer dive!!
_____ Max Depth (stay above Instructor/DM)
_____ Bottom Time

Monitor your gas supply – depletes fast at depth – at 99’, use 4x as much
Remember “Rule of Thirds”
First Diver to hit 1,000 PSI indicate to Instructor or DM by signaling
Back on Boat with 500 psi!
NO DECOMPRESSION DIVING – do not exceed NDL!!
Ascent Procedure – max safe rate is 30 feet/second
3-minute safety stop at 15 feet (10 – 20) mandatory - avoid crowding the line

_____ Surface Interval
_____ 2nd Dive Depth
_____ 2nd Dive Bottom Time

Entry and Exit Procedures
Exiting the Boat
o Carry fins to rear of boat, put on before exit
o Wait for DM OK to exit
o Hand on Mask and Regulator
o Hand on Gauges
o Giant Stride
o OK Sign to DM – clear from Boat
o Buddy Teams
o Swim to mooring line & descend when ready
o Wait at Mooring on Bottom for Instructor before proceeding
o Safety Check
Boarding the Boat
o Do not surface under ladder
o OK to DM after surfacing
o Leave Regulator in Mouth, and Mask on until on Boat
o Positive Buoyancy
o Ensure ladder is clear of divers
o Fins on/Fins Off
o DM will help you to your seat
o Bungee Tank
o (Begin prep for next dive & changeover tanks)

Buddy Team Assignments

Buddy Team Assignments – any diver without Buddy?
Buddy Check - Head to Toe
o Mask
o Air On
o Regulator & Alternate Air supply breathe freely
o All Buckles snapped
o Proper weighting.
o BC - Partially Inflated
o Gauges – Air Pressure
o Computer on – and set for proper Gas Mixture


Hazards
Nitrogen Narcosis - impairment
Caution surfacing
Boats in area
Propeller
Current
Surge

Emergency Procedures
If you feel stressed or tired during the dive, notify the Instructor, and turn the dive.
Surface signal – turn dive immediately
Lost Buddy procedures –1 minute search, then surface
While in water - Recall signal – banging on ladder
Problems on surface – get attention of DMAbandon ship