1. CAUSES: HUMAN INDUCED BEHAVIOUR OR NATURAL
1.1. FOOD DEPLETION /COMPETITION WITH HUMANS
1.2. TEACHING JUVENILES
1.3. ORCA ASKING FOR FOOD
1.4. DISEASE AFFECTING THE ORCA BEHAVIOUR
1.5. GENETICS
1.6. MARINE ENVIRONMENT POLUTION INCL. SOUND POLUTION
1.7. HUMAN ILLEGAL ACTIVITIES ILLEGAL FISHING
1.8. CURIOSITY
1.9. ORGANOLEPTIC MOTIVATED INTERACTION
1.10. ILLEGAL HUMAN ACTIVITIES
1.10.1. ILLEGAL FISHING
1.10.2. BAD TREATEMNT TO ORCAS
2. SOLUTIONS
2.1. DETERRENCE
2.1.1. ULTRASOUND
2.1.1.1. DEPREDATION PINGERS
2.1.1.1.1. EFFECTIVENESS?
2.1.1.2. BESPOKE ULTRASONIC DEVICES
2.1.1.2.1. ON CERTAIN FREQUENCIES
2.1.1.2.2. WHAT LEVEL OF ACCOUSTIC POWER IS NEEDED?
2.1.1.2.3. WIDE BAND JAMMING
2.1.2. UNDERWATER STROBOSCOPIC LIGHTS
2.1.3. AIR BUBBLES
2.1.4. ELECTRIC FIELDS SHOCKS?
2.2. REPELLENCE
2.2.1. HULL & RUDDER COATINGS
2.2.1.1. TAR
2.2.1.2. METHYLANTHRANILATE
2.2.2. SUBSTANCES IN THE WATER
2.2.2.1. CITRONELLA
2.2.2.2. SAND
2.2.2.3. AMMONIA
2.2.3. MECHANICAL MEANS
2.2.3.1. RUDDER REINFORCEMENT OR NEW DESIGN (RETRACTIBLE?)
2.2.3.2. RUDDER APPENDICES (SHARP HYDROFOILS?)
2.2.3.3. FIRE CRACKERS
2.2.3.4. HITTING METAL TUBES
2.3. OTHER
2.3.1. ORCA LOCATION AWARENESS
2.3.1.1. TAGGING ORCAS
2.3.1.2. ORCA WATCH & TRACKING
2.3.1.3. NO SAIL ZONES
2.3.1.4. REAL TIME DATA VIA INTERNET OR VHF
2.3.1.5. MIGRATION PATTERNS
2.3.2. UPDATED PROCEDURES IN CASE OF INTERACTION
2.3.3. YACHT CONVOY PASSING TROUBLED ARES
2.3.3.1. ORGANISING THE CONVOY
2.3.3.2. PROCEDURES
2.3.3.3. PROTECTORS AND COSTS
2.3.4. SAILING RANGE
2.3.4.1. SAILING FOLLOWING 10M BATHYMETER
2.3.4.2. SAILING FAR OUT FROM THE COAST
2.3.5. FEEDING ORCAS PROVIDING ALTERNATIVE SOURCES OF FOOD
2.3.5.1. SMALL FISH & SQUID
2.3.5.2. OTHER?
2.3.6. UNDERWATER MUSIC
2.3.6.1. MOZART?
2.3.7. HULL CAMOUFLAGE PATTERN
2.3.8. DRAGGING STREAMERS
2.4. FORBIDDEN
2.4.1. HARPOON
2.4.2. ULTRASONIC STUN GUN
2.4.3. TRANQUILIZERS
2.4.4. OTHER POISONOUS / POLUTING SUBSTANCES