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Elements and Performance Criteria

  1. Plan a decompression dive
  2. Select, inspect and fit equipment
  3. Enter and exit the water
  4. Descend to, and ascend from, a 30 m bottom
  5. Adequate awareness of, and distance from, surface and sub-surface hazards is maintained.
  6. Minimal disturbance to bottom is ensured to enable maximum visibility and a safe work environment.
  7. Safe surfacing is ensured.
  8. Identify and manage dive-specific medical problems
  9. Communicate through underwater radio devices
  10. Communicate non-verbally with other divers
  11. Perform a simple navigation leg underwater
  12. React to individual and group contingencies/ emergencies
  13. Maintain equipment

Required Skills

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 occupationaldiving safety awareness

diving in harbours

diving in tidal waters currents and tides

diving onnear a ships bottom eg boats propellers etc

lostseparated

entrapmentfoul lines

marine animal threats

pollutionweed

working in confined spaces

general precautions to be taken against the range of hazards

hand signals

handling procedures for nonfunctional 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 airsupplies

surfacing procedures

use of air decompression tables to determine decompression times and depths for a range of dive profiles

Evidence Required

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

comply with assigned callsigns

act as a relay between two 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 m waypoints only to be distinguishable within m

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 ADAS Pt Restricted dives with the diver diving to m using SCUBA air in open water that includes the following requirements

day and night

subsurface conditions

subsurface conditions:

current knots

visibility metre

temperature degrees

range of surface and subsurface hazards

range of surface and subsurface hazards.

Table 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 restricted license however divers seeking ADAS licensing need to confirm details with ADAS

Table

Condition

No of Dives

Bottom time mins

Remarks

Between m

Between 030m

Represents total accrued refer ADAS Pt Restricted Science Diver

Special Qualifiers

m dive

2530m dive

Zero visibility

Depth m

Depth: 29 m

Night

mins sunset

sunrise

Depth m

Table below outlines the minimum dives required for an unrestricted ADAS Pt license however divers seeking ADAS licensing need to confirm details with ADAS

Table

Condition

No of Dives

Bottom time

mins

Remarks

Between m

Between 030m

Represents total accrued refer ADAS Pt Diver

Special Qualifiers

m dive

2830 m dive

Zero visibility

per dive

Depth m

Depth: 29 m

Night mins sunset

sunrise

Depth m

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 divers vocational focus

Specific resources for assessment

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


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