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Evidence Guide: DEFDV001B - Dive using self-contained underwater breathing apparatus in open water to 30 metres

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

DEFDV001B - Dive using self-contained underwater breathing apparatus in open water to 30 metres

What evidence can you provide to prove your understanding of each of the following citeria?

Plan a decompression dive

  1. Dive plan is constructed using decompression tables.
  2. Dive plan is discussed and cleared, as necessary, by the supervisor.
Dive plan is constructed using decompression tables.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Dive plan is discussed and cleared, as necessary, by the supervisor.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select, inspect and fit equipment

  1. Equipment is selected, inspected for serviceability, fitted and tested if required.
  2. Any unserviceable equipment is quarantined and defects are reported according to organisational procedures.
  3. Independent check of fit and function of equipment by a diver's attendant or dive supervisor is ensured.
Equipment is selected, inspected for serviceability, fitted and tested if required.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Any unserviceable equipment is quarantined and defects are reported according to organisational procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Independent check of fit and function of equipment by a diver's attendant or dive supervisor is ensured.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Enter and exit the water

  1. Markers are positioned in the water to identify the presence of divers.
  2. Water is entered from sea-borne and land-borne platforms.
  3. An in-water leak test is conducted at the surface to ensure the integrity and functionality of the equipment.
  4. In-water checks are conducted.
  5. Buoyancy is adjusted to commence the dive and as required throughout the dive.
Markers are positioned in the water to identify the presence of divers.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Water is entered from sea-borne and land-borne platforms.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

An in-water leak test is conducted at the surface to ensure the integrity and functionality of the equipment.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

In-water checks are conducted.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Buoyancy is adjusted to commence the dive and as required throughout the dive.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Descend to, and ascend from, a 30 m bottom

  1. Measured and controlled breathing is maintained throughout the dive operation.
  2. Measured and controlled finning is maintained throughout the dive operation.
  3. Discomfort is prevented and safety is ensured by descending and ascending at an appropriate rate in accordance with dive plan, using appropriate decompression techniques.
  4. Diving descent and ascent techniques are implemented.
  5. Relevant factors are monitored throughout the dive.
  6. Threats posed are avoided or managed to ensure personal safety.
  7. Effects of open water environment are considered and managed during the dive to prevent impact against rocks, hulls or interference with other divers.
  8. Spatial awareness is recovered when balance is lost under conditions of zero visibility.
  9. When lost and/or separated, recovery is ensured.
Measured and controlled breathing is maintained throughout the dive operation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Measured and controlled finning is maintained throughout the dive operation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Discomfort is prevented and safety is ensured by descending and ascending at an appropriate rate in accordance with dive plan, using appropriate decompression techniques.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Diving descent and ascent techniques are implemented.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Relevant factors are monitored throughout the dive.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Threats posed are avoided or managed to ensure personal safety.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Effects of open water environment are considered and managed during the dive to prevent impact against rocks, hulls or interference with other divers.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Spatial awareness is recovered when balance is lost under conditions of zero visibility.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

When lost and/or separated, recovery is ensured.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Adequate awareness of, and distance from, surface and sub-surface hazards is maintained.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Minimal disturbance to bottom is ensured to enable maximum visibility and a safe work environment.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safe surfacing is ensured.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify and manage dive-specific medical problems

  1. Signs and symptoms of compression related problems are recognised (in self and others) and immediate corrective procedures are taken.
  2. Signs and symptoms of decompression related problems are recognised (in self and others) and immediate corrective procedures are taken.
  3. Heat and cold related problems are recognised (in self and others) and immediate corrective procedures are taken.
Signs and symptoms of compression related problems are recognised (in self and others) and immediate corrective procedures are taken.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Signs and symptoms of decompression related problems are recognised (in self and others) and immediate corrective procedures are taken.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Heat and cold related problems are recognised (in self and others) and immediate corrective procedures are taken.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Communicate through underwater radio devices

  1. Electronic communications device and accessories are inspected for serviceability and fitted.
  2. Messages are transmitted and received in accordance with radio telephone procedures (RTP).
  3. Electronic communications device transmission safety requirements are adhered to when working around dangerous items.
  4. Electronic communications device and accessories are de serviced and stowed.
Electronic communications device and accessories are inspected for serviceability and fitted.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Messages are transmitted and received in accordance with radio telephone procedures (RTP).

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Electronic communications device transmission safety requirements are adhered to when working around dangerous items.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Electronic communications device and accessories are de serviced and stowed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Communicate non-verbally with other divers

  1. Diver-to-diver hand signals are used appropriately throughout the dive operation.
  2. Written and diagrammatic communications on underwater writing boards are used appropriately throughout the dive operation.
  3. Standard single line signals are used appropriately throughout the dive operation.
Diver-to-diver hand signals are used appropriately throughout the dive operation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Written and diagrammatic communications on underwater writing boards are used appropriately throughout the dive operation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Standard single line signals are used appropriately throughout the dive operation.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Perform a simple navigation leg underwater

  1. Compass bearing is maintained underwater using a compass.
  2. Distance for a constant swim rate underwater is estimated and maintained.
  3. Distance travelled is estimated using a watch.
Compass bearing is maintained underwater using a compass.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Distance for a constant swim rate underwater is estimated and maintained.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Distance travelled is estimated using a watch.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

React to individual and group contingencies/ emergencies

  1. Flooded face mask is resolved by clearing and refitting.
  2. Blocked mouthpiece is resolved by clearing and refitting.
  3. Failed primary breathing system is resolved through switching to the alternate sources.
  4. Irrecoverable malfunctions are managed through buddy breathing and/or emergency surfacing.
  5. Lost/severed safety line/s are managed through surfacing.
  6. Significant systemic failures are managed through the ditching drill and emergency surfacing drill.
  7. Surfacing is accomplished with the optimum safe speed on hearing the emergency recall signal.
  8. Other divers are assisted.
Flooded face mask is resolved by clearing and refitting.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Blocked mouthpiece is resolved by clearing and refitting.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Failed primary breathing system is resolved through switching to the alternate sources.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Irrecoverable malfunctions are managed through buddy breathing and/or emergency surfacing.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Lost/severed safety line/s are managed through surfacing.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Significant systemic failures are managed through the ditching drill and emergency surfacing drill.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Surfacing is accomplished with the optimum safe speed on hearing the emergency recall signal.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Other divers are assisted.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Maintain equipment

  1. Equipment is maintained during the dive.
  2. Post-dive, equipment is de-serviced, and tested (if required) and stowed.
  3. Unserviceable equipment is quarantined and defects are reported in accordance with organisational procedures.
Equipment is maintained during the dive.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Post-dive, equipment is de-serviced, and tested (if required) and stowed.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Unserviceable equipment is quarantined and defects are reported in accordance with organisational procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessment must confirm the ability to:

safely enter and exit the water appropriate to the launch platform, equipment and conditions

avoid and manage medical complications during dives

avoid and manage hazards during dives

comply with assigned callsigns

act as a relay between two callsigns

receive a number of hand signal messages, demanding acknowledgement, interpretation and appropriate responses from the diver

relay hand signal message to other divers

receive a number of written messages including diagrams, demanding acknowledgement, interpretation and appropriate responses from the diver

draft a number of written messages including diagrams

receive a number single line signal messages, demanding acknowledgement, interpretation and appropriate responses from the diver

navigate underwater, using a compass only, a complete triangle, of side length not less than 30 m (waypoints only to be distinguishable within 8 m).

Consistency in performance

Competency will be demonstrated over a minimum of 12 (ADAS Pt 1 Restricted) dives with the diver diving to 30 m using SCUBA (air) in open water that includes the following requirements:

day and night

subsurface conditions:

current (0–2 knots)

visibility (0 metre +)

temperature (0 degrees +)

range of surface and subsurface hazards.

Table 1 (below) outlines the minimum dives required by this Unit of Competency. At the time of printing, this contributed to the achievement of an ADAS Pt 1 (restricted) license, however divers seeking ADAS licensing need to confirm details with ADAS.

Table 1

Condition

No of Dives

Bottom time (mins)

Remarks

Between 030m

12

325

Represents total accrued – refer ADAS Pt 1 Restricted (Science Diver)

Special Qualifiers

2530m dive

1

15

Zero visibility

1

20

Depth: 29 m

Night

(+30 mins sunset/

sunrise)

1

20

Depth: 10 m

Table 2 (below) outlines the minimum dives required for an ‘unrestricted’ ADAS Pt 1 license, however divers seeking ADAS licensing need to confirm details with ADAS.

Table 2

Condition

No of Dives

Bottom time

(mins)

Remarks

Between 030m

21

660

Represents total accrued – refer ADAS Pt 1 Diver

Special Qualifiers

2830 m dive

1

15

Zero visibility

2

20 (per dive)

Depth: 29 m

Night (+30 mins sunset/

sunrise)

1

20

Depth: 29 m

Context of and specific resources for assessment

Context of assessment

Competency will be assessed in the ocean over a range of oceanic, diurnal and nocturnal environments, supported by questioning on shore or aboard vessels.

When practicable, assessment should relate to the diver’s vocational focus.

Specific resources for assessment

Access to a complete range of diving, safety and accessory equipment; open water dive site; and dive platform.

Required Skills and Knowledge

This describes the essential skills and knowledge and their level, required for this unit.

Required Skills

compile briefs and clear messages

conduct decompression stops

conduct predetermined decompression requirements

conduct unplanned decompression procedures arising from the onset of (simulated) compression related problems

navigate

signalling:

hand signalling

line signalling

written signalling

switch from primary to the reserve air system

use the phonetic alphabet

use words twice procedures

Required Knowledge

decompression calculations

dive equipment

dive physics

dive physiology and medicine:

heat and cold illnesses

compression illnesses

decompression illnesses

general occupational/diving safety awareness:

diving in harbours

diving in tidal waters, currents and tides

diving on/near a ship's bottom (e.g. boats, propellers, etc.)

lost/separated

entrapment/foul lines

marine animal threats

pollution/weed

working in confined spaces

general precautions to be taken against the range of hazards

hand signals

handling procedures for non-functional items

line signals

literacy

marine animal threats

marine hazards

navigation theory

oceanography

radio frequency hazards

radio telephone procedures (RTP)

relevant references and Australian Standards

phonetic alphabet

principles of underwater communication systems and diver intercom systems and their limitations

safe operating ranges for air-supplies

surfacing procedures

use of (air) decompression tables to determine decompression time/s and depth/s for a range of dive profiles

Range Statement

The Range Statement relates to the Unit of Competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording in the Performance Criteria is detailed below.

Decompression tables may include:

Defence Civil Institute of Environmental Medicine

Equipment may include:

breathing system and devices:

cylinder

configuration

demand

independent primary

pressure

positive

single

supply

buoyancy devices:

buoyancy compensator

weight belt

dive clothing:

fins

gloves

wetsuit (includes booties and hood)

diving accessory equipment:

communications slate

compass

face mask/mouthpiece ensemble

knife

watch

safety equipment:

diver’s safety lines

Entry to the water may include:

dive

forward/backward jump

rollback

walkin (backwards)

Platforms may include:

boats

semipermanent platforms

ships

Buoyancy includes:

positive

negative

neutral

Decompression techniques may include:

lazyshot and drifting stops

lazyshot and fixed shot rope

lazyshot and float line

lazy shot and life line

surface

Diving descent and ascent techniques may include:

breathing

buoyancy maintenance

equalisation

maintaining situational and positional awareness throughout the dive

monitoring equipment and gauges

propulsion

surfacing

Relevant factors may include:

air

depth

equipment

location

other divers

time

Threats may include:

pollution

weed

other debris

Effects of open water environment may include:

currents

swells

wave action

Ensuring recovery may include:

employing rendezvous procedures

surfacing

Surface and subsurface hazards may include:

anchor drop zones

cathodic protection devices

electrical cabling

inlets and sonar/radio frequency hazards

marine animals

piers and jetties

pipelines

pollutants

propellers/thrusters

trapping hazards:

beams

culverts

gates

grottoes and caves

intakes and outfalls

nets

safety, anchor and communications lines

sluices

sewers

submerged ships, vehicles and structures

vessel rocking and associated movement

Ensuring safe surfacing must include:

checking for the sounds of propellers before committing to breaching the surface

advancing the arm above the head for protection and signalling, and once surfaced, gaining 360 degree awareness

Electronic communications device may include:

topside/surface

subsurface divers systems:

hard wire

through water voice

Accessories may include:

antenna

ear set

microphone

Radio telephone procedures may include:

callsigns

phonetic alphabet

prowords

relaying messages

words twice procedures

Dangerous items may include:

explosives

Assisting other divers may include:

physically recovering a diver to the surface using the ‘companion diver’ drill (including unconscious companion)

searching for a lost buddy

sharing air supply through buddy breathing