Referring Clues

• Sub detector
• Sub standard?
• Item on a sub
• Sub's "ears"
• Echolocation device
• Destroyer detector
• Salvager's system
• Whale finder
• Source of waves at sea
• Ship salvager's aid
• Antisub device
• Navigational aid
• Sea salvage aid
• Detection device
• Echolocation
• Echo analyzer
• U-boat detector
• Salvager's gear
• Submarine detector
• It hunted for Red October
• Echo finder
• 52-Down gear
• Blip maker
• Sub system
• Sub finder
• Marine detector
• Blip displayer
• Salvaging aid
• Whale spotter
• Aid in removal of mines
• Bat signals?
• School locator
• Salvage ship's equipment
• Kind of signal
• A school might be found using it
• Deep-sea fishing aid
• Salvager's equipment
• Submarine-detecting system
• Coast Guard equipment
• Underwater wave generator
• Ocean explorer's aid
• School locator?
• Sunken ship finder
• Sub's navigational aid
• Ping producer
• Fish finder
• Method for detecting submarines
• Fleet finder
• Bat's detection tool
• Echoic finder
• Bass boat feature
• Dolphin faculty
• Sub technology
• Ocean tracker
• Fish-finding aid
• Shipwreck finder
• Underwater detection device
• Underwater finder
• Depth finder
• Method for tracking subs
• Vessel detector
• Underwater object locater
• Sub tracking device
• Hydroacoustic technology
• Submarine finder
• Wolf pack locater
• Salvage ship equipment
• Sub locator
• Tool for bats
• Sub sensor
• Submarine tracking device
• Naval device
• Tracking method
• Sub's tracking device
• Sub tracker
• Undersea acronym
• Undersea tracker
• Submarine tracker
• Salvage-ship equipment
• Treasure hunter's aid
• Kin of echolocation
• Echo sounder
• Underwater transmission
• Bats use it
• Sub-conscious sensor?
• Submarine apparatus
• Sub seeker
• Echo-sounding equipment
• Sub's ears
• Salvaging aid, perhaps
• Bass boat feature, sometimes
• Navigation device
• Subs defense system
• Sub device
• Fish tracker
• Salvager's detection system
• Dolphin's sense
• System in a submarine
• Fish detector
• Aid in finding the Titanic
• Sub-tracking device
• Echo-sounding system
• Submarine sensing system
• Red October detector
• Ping maker
• Aid in finding sunken ships
• Shipwreck locator
• Navigation tool
• Fishing-boat accessory
• Underwater sound device
• Sub sighter
• Sub spotter
• School-searching tool
• Ship tracker
• Dolphin sense
• Mine locator
• Submarine-detecting device
• Echolocation acronym
• Water penetrating device
• Feature of some fishing boats
• System used on a sub
• Underwater tracker
• Mine detector
• Echo-location method
• Echolocation method
• Bat signal?
• Radar relative
• Sub apparatus
• Submarine locator
• Hydroacoustic tool
• Whale locator
• Nautical detector
• Sub navigation tool
• Torpedo detector
• Wolf pack tracker
• Navigation aid at sea
• Hydroacoustic device
• Whale tracker
• Navigating system
• U-boat finder
• Submarine sensor
• Shipwreck hunter's aid
• Navigation acronym
• Dolphin facility
• It might pick up a big fish
• Radar's kin
• Submarine locating device
• Bats navigate with it
• Echolocator
• Creator of ocean waves
• Mine finder
• Salvage mission aid
• Submarine equipment
• Capability of whales and dolphins
• Wreck locator
• Ship's tracking device
• Modern navigation tool
• Whale facility
• Bats' navigational tool
• Sub sounder
• Salvage ship's detection system
• Technique using underwater acoustics
• Fish-tracking aid
• Detection device that can confuse whales
• Tracking system
• Sub's detection system
• Sub locater
• Tracking device
• Underwater detection system
• Sub machine
• Bats navigate by it
• Echolocation system
• Echo-sounding
• Fly high around the pole, with navigational aid
• Sound means of detecting arson?
• Upon reflection, an aid to location
• Help in finding objects on a river bed
• Underwater location equipment
• Detection system
• Position-finding device
• System for locating underwater objects
• Ship's aid (Issue One) with reverse
• Echo sounder - arson (anag)
• Fish-finding device
• Underwater detection technique
• Sunken-object detector
• Detector of meson, a research tool
• System of locating some objects on a radar
• Is it dependent on 6 to fly round the pole?
• Device used by sailors on Ark Royal
• Salvage ship's gear
• Mine countermeasure
• Detection device in a submarine
• Underwater radar
• Navigation aid
• Means of locating '12'?
• Submarine locater
• Detecting device
• Submarine navigation device
• Underwater detector
• Batty navigation aid
• Bat's echolocation system
• One method of locating schools
• Sub feature
• Ocean floor mapping aid
• Salvager's device
• Submarine device
• Bathymetry tool
• Submarine navigation aid
• Bat's navigation aid
• Modern bass boat device
• Underwater navigation aid
• Could it give guidance in solving arson?
• Submarine seeker
• Sub detection device
• Shipwreck-finding tech
• Sound-based detection method
• Underwater tracking device
• Detection method
• Dolphins use it to navigate
• Device for detecting underwater objects
• Possible means of detecting arson?
• Toothed whale's technique
• Naval navigation device
• Shipwreck hunter's device
• Counterpart of radar
• Dolphin communication method
• Underwater navigation tool
• Dolphin's detection process
• Nautical navigation tool
• Bat signal?
• Sound means of detecting arson?
• Ship's detection system
• Sub standard?
• Shipwreck detector
• Sound-based detection system
• Naval acronym
• Underwater tracking aid
• System for underwater detection
• Military technology that's a source of stress for whales
• Technology used in seafloor mapping
• Help in finding subs
• Means of locating 12 Across?
• Echolocation is a natural form of it
• Submarine's tech
• The Titanic disaster partly inspired its invention