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(Click for frequent words.) 54 Amchitka Island 51 Resolute Nunavut 49 Ny Aalesund 49 Fiord 49 Ein Shemer 48 PAVE PAWS 48 Cape Lisburne 48 Diefenbunker 48 Wrangell Narrows 47 Amchitka 47 P3 Orion 47 Grytviken 47 Peenemunde 47 Hellcat fighter 47 Axel Heiberg Island 47 McMurdo Station Antarctica 46 Bentwaters 46 Thule Greenland 46 Wing Shearwater 46 Orford Ness 46 McMurdo Sound 46 Grise Fiord 46 Inuvik NWT 46 MDARS 46 Bomarc 46 HMCS Corner Brook 45 Pangnirtung Nunavut 45 Kwajalein atoll 45 Sproat Lake 45 CFB Comox 45 missile silos 45 Kwajalein Island 45 Attu Island 45 Novaya Zemlya 45 icefield 45 Esquimalt BC 45 Mekoryuk 45 Breaksea 45 Polar Epsilon 45 Svalbard Norway 45 Te Hapua 45 AN/TPY-2 radar 45 Thorney Island 44 Qaanaaq 44 SBX radar 44 Akutan 44 Svalbard archipelago 44 Avro Arrow 44 Gremikha 44 USS Albacore 44 PAVE PAWS radar 44 McMurdo Base 44 Deep Siren 44 HMCS Victoria 44 radars telemetry 44 electro optic sensors 44 Baghran Valley 44 Apollo Lunar Module 44 Svalbard Islands 44 Inuvik Northwest Territories 44 pilotless Predator aircraft 44 Landsat images 44 NASA CloudSat 44 Baffin Island 44 Bombing Range 44 crewless 44 Norway Svalbard 43 laser altimetry 43 HMCS Windsor 43 coaling 43 midget submarines 43 Adak Alaska 43 CFB Cold 43 Sable Gully 43 Nanisivik 43 destroyer HMCS Iroquois 43 RADARSAT 2 43 Blighter 43 Canso NS 43 Ny Ålesund 43 Johnston Atoll 43 Gjoa Haven Nunavut 43 SeaBees 43 submarine periscopes 43 Umnak Island 43 Frobisher Bay 43 Lockheed Martin Waterton Canyon 43 submarine HMS Astute 43 Astrotech payload processing 43 Nunavut hamlet 43 HMCS Whitehorse 43 loran 42 Kugluktuk Nunavut 42 Domain Awareness 42 Tuktoyaktuk 42 subarctic 42 penguin rookery 42 Ny Alesund 42 Russia Kamchatka peninsula 42 Point Pelee 42 Taloyoak 42 Lockheed Skunk Works 42 Nunavut Territory coal 42 Gjoa Haven 42 Aleutian Chain 42 Haughton Crater 42 Tararua Range 42 RAF Bentwaters 42 gunnery ranges 42 Afognak Island 42 Operation Chastise 42 Heron unmanned aerial 42 Kangerlussuaq Greenland 42 Point Aconi 42 Kasigluk 42 Tuktoyaktuk Northwest Territories 42 USS Thresher 42 Skycrane 42 Purcells Cove 42 Poker Flat 42 Svalbard islands 42 Pond Inlet 42 RAF airfield 42 Tanegashima island 42 Titan 4B 42 transcontinental telegraph line 42 SB2C Helldiver 42 Prydz Bay 42 Gwich'in Athabascan 42 reconnaissance 41 penetrating radars 41 Curiosity rover 41 Moosehorn 41 Maralinga 41 Operation Nunalivut 41 HMC Dockyard 41 Base Gagetown NB 41 Kintla Lake 41 Grumman Mallard 41 Fort St. Vrain 41 RQ 7B Shadow 41 destroyer HMCS Athabaskan 41 Resolute Bay 41 Awarua 41 Greenham Common 41 gun emplacement 41 Grovers Mill 41 NASA THEMIS 41 blockhouses 41 ancient Polynesians 41 Spurn Point 41 Ammassalik 41 icebound 41 Spitzbergen 41 Wallops Island Va. 41 OSRVT 41 Chichagof 41 Clementine bi static 41 Omelek Island 41 Nimrod MR2 aircraft 41 navigation aids 41 destroyer HMCS 41 Borei class 41 D' Urville 41 Twin Otter airplane 41 codebreaking 41 Chukotka Peninsula 41 SCISAT 41 Tarnak Farms 41 French Frigate Shoals 41 Andreeva Bay 41 Aleutian island 41 Hound Chute 41 Athabaskan 41 Silver Dart 41 Glomar Explorer 41 Kangerlussuaq 41 frontier forts 41 Peril Strait 41 navigational beacons 41 Molczan 41 Aerosonde aircraft 41 ESA Envisat 41 interceptor silos 41 transpolar 41 reachback 41 Sisimiut 41 reconnaissance drones 41 UEWR 41 Sermilik Fjord 41 mapping geochemistry 41 lightships 41 unpiloted aircraft 40 Kitikmeot region 40 Wrangell Mountains 40 Gakkel Ridge 40 Seawolf class 40 Deadhorse Alaska 40 polar orbiting satellites 40 Operation IceBridge 40 birchbark canoe 40 Musudan ri 40 navigational beacon 40 HMC Ships 40 Aleutian Islands 40 al Qurnah 40 Porthcurno 40 UUVs 40 Leif Ericson 40 Carcross 40 Lower Tertiary trend 40 Oodnadatta 40 Shuttle Endeavour undocks 40 Spadeadam 40 Anaktuvuk Pass 40 Dismal Nitch 40 AWE Aldermaston 40 polar expeditions 40 Ikonos 40 missiles torpedoes 40 Operation Narwhal 40 Inuit elders 40 Foulness 40 Gaspé Peninsula 40 cryptologic 40 unmanned airborne 40 Base Esquimalt 40 THAAD radar 40 saltworks 40 Army Ammunition 40 AERONET 40 Noatak 40 Yuri Dolgoruky 40 HMCS Montreal 40 Al Tuwaitha 40 Alaska Aleutian 40 floatplanes 40 Ordnance Works 40 Faslane Scotland 40 Inuvik 40 Chaudière Falls 40 Marinship 40 lunar landers 40 unmanned 40 Peggys Cove 40 Aberporth 40 bluebird trails 40 HMS Vengeance 40 penetrating radar 40 Michilimackinac 40 Kipnuk 40 Gander Nfld 40 Halley VI 40 U 2S 40 robotic rovers 40 Bransfield Strait 40 pilotless Predator 40 Little Diomede 40 Deadhorse 40 Tecate Peak 40 reconnaissance satellites 40 polar explorer Roald Amundsen 40 Coulport 40 Dirk Hartog Island 40 Scud missile launchers 40 sextants 40 geostationary communications 40 Phased array 40 gradiometer 40 CFB Greenwood 40 Hageland Aviation 40 uncharted wilderness 40 delayed orbiter SELENE 40 Uninhabited Aerial Vehicle 40 intelligence SIGINT 40 Kittyhawk 40 geostationary satellite 40 USS Wenonah 40 RNZAF Orion 40 Alaskan panhandle 39 Arctic archipelago 39 Bagotville 39 CFB Goose 39 NASA Wallops Flight 39 Marsis 39 Navy minesweeper 39 Cape Alava 39 Kola peninsula 39 USS Flier 39 Trudy Wohlleben 39 Hardanger Fjord 39 Liberator bombers 39 Stikine River 39 Prawle Point 39 Meagan McGrath 39 HMS Dreadnought 39 Ted Molczan 39 Battlespace 39 primitive campsites 39 German battleship Tirpitz 39 NASA Wallops 39 radar altimetry 39 STSS satellites 39 TDRS satellites 39 Guglielmo Marconi experiments 39 Jean Thie 39 Greenwood NS 39 HMS Terror 39 Canso Causeway 39 Fairey Swordfish 39 NPO Lavochkin 39 Peggy Cove 39 Keflavik Iceland 39 Hawaii Undersea 39 Langara Island 39 L' Anse aux 39 Operation Nanook 39 multibeam 39 megaflood 39 Holy Loch 39 EP 3E 39 Naval Ammunition Depot 39 Shackleton Crater 39 Saanich Inlet 39 Yellowknife Northwest Territories 39 datalinks 39 Minuteman IIIs 39 Queen Maud 39 Dunstaffnage 39 McMurdo Dry Valleys 39 Suffield Alta 39 Mannert L. Abele 39 frozen Bering Strait 39 laser altimeter 39 robotic submersibles 39 primitive campground 39 VTOL UAV 39 Mothballed 39 dummy warheads 39 boneyards 39 Longyearbyen Norway 39 B# bombers 39 Beardmore Glacier 39 Ellesmere Island 39 Admiralty Island 39 stargates 39 Kulusuk 39 Uchinoura 39 rock outcrop 39 Seward Peninsula 39 Port Alsworth 39 Shuttle Endeavour docks 39 Pouto 39 shipborne 39 Al Faw Peninsula 39 Pensacola NAS 39 SUAV 39 lunar equator 39 railroad sidings 39 RF 4C 39 Inertial Navigation 39 Great Slave Lake 39 Buttonville Airport 39 Kotzebue Sound 39 minehunting 39 antiship missiles 39 portlands 39 Karmøy 39 Kiruna Sweden 39 Kanaga Volcano 39 Undersea Warfare 39 Netul Landing 39 Lt. Comdr 39 Paluma 39 intercontinental ballistic missiles ICBMs 39 Naval Yard 39 Naval Ordnance 39 reconaissance 39 Goonhilly 39 REMUS 39 Data Buoy 39 Svalbard Archipelago 39 Tonquin 39 LATN 39 ScanEagle unmanned aerial 39 ESA Envisat satellite 39 Belconnen Naval Transmission 39 HAARP 39 Woomera 39 THAAD missile 39 Gamburtsev 39 Siberia Lake Baikal 39 Atarau 39 Vastitas Borealis 39 northernmost reaches 39 USS Blueback 39 HMS Sceptre 39 Atigun Pass 39 hypersonic glider 39 uninhabited 39 Dakshin Gangotri 39 Norad 39 laser designators 39 Rothera 39 Nikolski 39 JORN 39 Sparrow Missile 39 explorer Roald Amundsen 38 AWACS airborne warning 38 decomissioning 38 austral winter 38 trapline 38 DUKW 38 Norwegian explorer Fridtjof 38 Maritime Helicopter Squadron 38 Mount Erebus 38 Saxa Vord 38 HMS Upholder 38 CH #D Chinook 38 Solovetsky Islands 38 Mars moon Phobos 38 Hanksville 38 sprawling Al Qaqaa 38 flew reconnaissance missions 38 Sable Island 38 hyper spectral 38 icebreaker CCGS 38 decommissioned 38 Yonaguni Island 38 Broadmoor Bluffs 38 overland expedition 38 Lubec Maine 38 submarine chasers 38 Iceberg Alley 38 Quick Reaction Alert 38 Nunivak Island 38 Minas Passage 38 submarine chaser 38 Dumont d'Urville station 38 EPLRS 38 Piragis 38 ancient cliff dwellings 38 Naval Reactors 38 spyplanes 38 Anvers Island 38 RAF Fylingdales 38 ocean buoys 38 P3C Orion maritime 38 underground vaults 38 AMASE 38 Ingleside Naval 38 explorer Jacques Cartier 38 Polar Continental Shelf 38 Tactical Trainer 38 Tundra Buggy 38 SpaceX Dragon capsule 38 Little Diomede Island 38 densely treed 38 Franz Josef Land 38 WC #J 38 Piper Chieftain 38 Selawik 38 SIGINT 38 canoe outfitter 38 Messalonskee Stream 38 NROL 38 Champlain Canal 38 Elburz 38 aerial photographs 38 Aqua satellite 38 icebreakers satellites 38 Leh Manali road 38 Shemya 38 HMAS Melville 38 antisubmarine warfare 38 Earth orbiting satellites 38 STAR GATE 38 Uriarra 38 Brigham Grette 38 radiosonde 38 Bathurst Inlet 38 Kuhles 38 unmanned reconnaissance drones 38 antiballistic missile 38 raptor migration 38 vehicles UAVs 38 Gwaii Haanas 38 fiords 38 Whillans Ice Stream 38 Vigilare 38 unmanned robotic 38 Sclair 38 isolated Johnston Atoll 38 C #E Hercules 38 near Qarraya 38 Coldfoot 38 stratospheric balloon 38 PBY Catalina 38 Greenland icecap 38 Eareckson Air 38 submarine 38 optionally manned 38 Porsild 38 oily mist 38 Machias Seal Island 38 unmanned Predator aircraft 38 Pelindaba 38 Quoddy Head 38 Aerial photography 38 Achieve Mapping Catheter 38 Priz AS 38 HMS Splendid 38 Devonport Dockyard 38 Skrunda 1 38 tritium laced 38 drifting ice floe 38 sandy spit 38 Frontier Discoverer 38 L' Astrolabe 38 Unidentified Flying Objects 38 UAVSAR 38 Kon Tiki expedition 38 Forward Looking Infrared FLIR 38 Observing System 38 Coral Harbour 38 Exoatmospheric Kill Vehicle 38 Narsaq 38 GPS IIF satellites 38 Allied bombardments 38 seafloor mapping 38 Tsugaru Strait 38 PASSUR radar 38 Norway Svalbard archipelago 38 lightkeepers 38 Welland Canal 38 Eskdalemuir 38 Earth asteroid Itokawa 38 Winfrith 38 Tern Island 38 KOTZEBUE 38 Muskeget 38 Argentia Newfoundland 38 Napier Wairoa 38 Minuteman missiles 38 Queen Charlottes 38 Noel Wien 38 Hadlock Pond 38 meteor crater 38 Arafura Swamp 38 Ronaldsway Airport 38 Yellowknife 38 artillery emplacements 38 Cape Flattery 38 USS Silversides 38 MTSAT 1R 38 Sable Offshore Energy 38 Maligne Lake 38 Chilkoot 37 Navy destroyers 37 CFB Bagotville 37 Unmanned Aircraft 37 Clipper Adventurer 37 Differential Global Positioning 37 Hurtigruten cruise 37 USS Bowfin 37 3 Wing Bagotville 37 Axel Heiberg 37 unmanned reconnaissance aircraft 37 Malpeque Bay 37 Jervis Bay 37 Antarctic expeditions 37 Joggins Fossil Cliffs 37 Sydney Holsworthy 37 Camp Peary 37 Kalluk 37 Twofold Bay 37 Wairau Bar 37 Anzio Italy 37 MV Beluga SkySails 37 F/A-# jets 37 Changcheng Station 37 Algonquins 37 Darrell Priede 37 submarine Dmitry Donskoy 37 USS Nautilus 37 Martian rovers 37 Palaly airbase 37 Provideniya 37 Shiprider 37 dummy warhead 37 Predator UAV 37 interceptors launchers 37 vast Gusev Crater 37 Loch Striven 37 GOES satellites 37 GHMD 37 Salang Tunnel 37 Tidbinbilla 37 Inupiat village 37 polar plateau 37 Julia Gaffield 37 Antarctic 37 Stromlo 37 dogsled expedition 37 ruggedly beautiful 37 Osiraq nuclear 37 Kawau Island 37 Ureweras 37 Arctic Circle 37 Lizard Peninsula 37 BrahMos cruise missile 37 radio telegraphy 37 Arctic ice floe 37 Unmanned drone 37 missile interceptor 37 MH #R aircraft 37 Coastwatch 37 Mosquito Fleet 37 Shuttle Discovery blasts 37 Missile Defense System 37 RC #S 37 Consolidated PBY Catalina 37 Graphite Reactor 37 SPY 1F 37 NAVSTAR Global Positioning System 37 Project Ozma 37 ferry dock 37 Egrmajer 37 HMS Campbeltown 37 submarines homeported 37 sidescan 37 sondes 37 Operation Deep Freeze 37 Antikythera mechanism 37 Blackhawk Helicopter 37 Des Groseilliers 37 Asiatic Fleet 37 Aklavik 37 Kouchibouguac 37 EC #J 37 AWACS radar 37 bomb aimer 37 Sandbars 37 aboard HMS Beagle 37 Flamborough Head 37 Michoud La. 37 Google Streetview 37 Dunsfold Aerodrome 37 Arrow interceptor 37 unmanned rotorcraft 37 airstrip 37 icebreaker Kapitan Khlebnikov 37 Whatipu 37 Crozet Islands 37 Michael Studinger 37 Global Positioning Satellites 37 NORAD NORTHCOM 37 satellites 37 spaceborne 37 Oyadao 37 Paglen 37 USAAF 37 reconnaisance 37 Shuttle Atlantis undocks 37 TanDEM X 37 USS Scorpion 37 NAVOCEANO 37 Studland Bay 37 Pagat village 37 Esrange 37 Barbers Point Naval 37 Coast Guard cutter Mackinaw 37 Whangaparaoa Peninsula 37 Kaktovik 37 DRDC 37 Unmanned aerial 37 Antarctic explorers 37 GPS Block IIF 37 Loch Ewe 37 Austal shipyard 37 comet Boethin 37 CH #D helicopter 37 steam locos 37 Sai Thein Win 37 B 1B Lancer 37 Begich Boggs 37 adn.com thevillage 37 echo sounders 37 Tangimoana 37 JOIDES Resolution 37 Dillingham Airfield 37 Jodrell Bank 37 RQ 4B Global 37 unmanned aerial drone 37 firebases 37 HC #J 37 Autosub 37 Fireweed Lane 37 Orkneys 37 helicoper 37 Baffin 37 Omer Lavoie 37 radar scopes 37 underwater archeologists 37 Hagestedt 37 North Pole 37 calving glacier 37 gamma ray detectors 37 Okareka 37 Kwigillingok 37 Idlout 37 Shuttle docks 37 Coast Guard icebreaker Healy 37 Desolation Sound 37 Moeraki 37 photonics mast 37 Bellingshausen 37 alien spaceships 37 Antarctica 37 de Havilland Otter 37 localiser 37 McMurdo Station 37 Schean 37 Muja Power 37 Harwell Oxfordshire 37 Waihopai Valley 37 seismographic 37 Gakona 37 ENVISAT 37 Servant Air 37 minehunters 37 Shemya Island 37 defueling 37 Nevatim air 37 Tiger Moth biplane 37 tidal inlet 37 Chilkat 37 Morobe Province 37 NEXRAD radar 37 Hydrographic Service 37 Nasa spacecraft 37 destroyer escorts 37 minelayer 37 Westfjords 37 USS Ticonderoga 37 Misty Fjords 37 Kham Duc 37 Airforce Orion 37 Iglulik 37 icebergs drifting 37 decomissioned 37 Akademik Ioffe 37 Mars landers 37 icebreaker Amundsen 37 Johnstone Strait 36 Arctic Archipelago 36 Jamestown Rediscovery 36 lidar instrument 36 Belanday 36 troposcatter 36 Rapid Deployment Forces 36 expeditioners 36 Cryosat satellite 36 Chukchi Seas 36 SH #B Seahawk 36 Northwest Passage 36 Hokianga Harbour 36 Subarctic 36 schooner Bowdoin 36 CFB Moose Jaw 36 Tunguska meteorite 36 UNIVAC 36 Navair 36 Jacob Verhoef 36 lunar rovers 36 Aurora Australis 36 minisub 36 Ground penetrating radar 36 Stena Forth 36 Zhongshan Station 36 Matanuska Glacier 36 Vitus Bering 36 Bylot Island 36 Predator UAVs 36 promontory overlooking 36 antiaircraft artillery 36 Vessel Monitoring System 36 Fred Machetanz 36 IceCube Neutrino Observatory 36 antarctic 36 HMS Turbulent 36 Inuit hunters 36 electro-optical/infrared sensor 36 Spitsbergen Norway 36 Laserich 36 Inshas 36 Samuel Risley 36 coaling station 36 inertial navigation system 36 Melkoya 36 Arctic Tern 36 Admiral Ushakov 36 melting permafrost 36 MCAS Yuma 36 Mine Countermeasure 36 Chillingham Castle 36 Spaceguard 36 blockhouse 36 sub antarctic 36 C# Hercules transport 36 Chinle Ariz. 36 Cormorant helicopters 36 Travelli 36 Misov 36 Watchkeeper UAV 36 Bayliner boats 36 NAS Pensacola 36 Confederate raiders 36 Magnox reactors 36 Jandakot airport 36 RAF St Mawgan 36 Cape Wrath 36 Vigilant Eagle 36 GPWS 36 NAVSTAR GPS 36 subantarctic 36 Hoo Peninsula 36 Shuttle undocks 36 GPS 2R 36 prolific looter 36 satellite 36 sonars 36 migrant songbirds 36 Doomsday Seed Vault 36 Automated Surface 36 refrozen ice 36 doomsday vault 36 Larsemann Hills 36 fortifications 36 FLIR Forward Looking 36 Umberto Nobile 36 Mazagon Docks 36 Yad Yair 36 reconnaissance missions 36 Radarsat 2 36 Brilliant Pebbles 36 tactical UAV 36 unmanned underwater 36 Amery Ice Shelf 36 Osirak nuclear 36 Quetico 36 Manzanar internment camp 36 Mount Umunhum 36 Marvinney 36 submarine torpedoes 36 Awacs aircraft 36 RV Polarstern 36 Yeovilton Somerset 36 naval shipyard 36 Kiel Canal 36 Nares Strait 36 geostationary 36 J UCAS 36 Hanford Wash. 36 Dunnet Head 36 topographical mapping 36 bathyscaphe 36 Qabala 36 LE Aoife 36 Ussuri River 36 oceanographic 36 stone cairns 36 unmanned reconnaissance 36 HAWCS helicopter 36 Mawson Huts Foundation 36 Port Burwell 36 Lake Couchiching 36 Faulkes Telescope 36 Longannet coal 36 remote 36 Forward Looking Infrared 36 HITRON 36 steep mountainous terrain 36 Unmanned Aerial System 36 Chena Pump Road 36 airplane fuselages 36 Toolik Field Station 36 Scammon Bay 36 UAV 36 Cape Otway 36 volcano observatory 36 Moosonee 36 Bramley Murton 36 Gimli Glider 36 Cape Spear 36 hydrothermal vent 36 semiautomatic carbine 36 Hunua Ranges 36 firebase 36 Dimona reactor 36 Wing Comox 36 astronomically overpriced 36 USS Requin 36 Unimak Pass 36 Enduring Voices 36 Hunterston B nuclear 36 endangered sperm whales 36 Seamounts 36 Intelligence C4I 36 HMAS Yarra 36 hypersonic jet 36 Plesetsk Cosmodrome 36 British warship HMS 36 CFB Rockcliffe 36 Tent Dwellers 36 Langley AFB 36 Chilbolton 36 Baddeck Nova Scotia 36 TUAV 36 Chatanika 36 prefabricated huts 36 Fylingdales 36 Cliff Dwellings 36 polarimetric 36 battlecruiser 36 Radarsat 36 Redu Belgium 36 Klappan 36 Juneau Icefield 36 LORAN C 36 Guatemala sinkhole 36 Badger Army Ammunition 36 Shearwater NS 36 Houhora 36 MARSIS 36 northernmost 36 Palmahim 36 Dyess AFB Texas 36 near Hythe Alta 36 Base Comox 36 interferometric synthetic aperture radar 36 Coster Mullen 36 Yentna River 36 supersonic jet fighter 36 rover Sojourner 36 islanded 36 Dumont d' Urville 36 powered icebreakers 36 UHF radios 36 PBS Coals Quecreek Mine 36 Point Loma Naval Base 36 Munuscong 36 Reversing Falls 36 Twin Otters 36 nonnative mussels 36 Al Udeid 36 Prowler squadrons 36 EA 6B 36 Napaskiak 36 Wurtsmith 36 austral summer 36 Surveillance Radar 36 Bell UH 1H 36 northern boreal forests 36 Kerguelen Island 36 Kunsan Air Base 36 RAF Scampton 36 Yury Dolgoruky 36 Icecap 36 Orkney islands 36 Auyuittuq National 36 Earthscope 36 lain unused 36 ESA Earth Observation 36 electro optical sensor 36 Hualapai reservation 36 VSOC 36 Hemlo Ontario 36 Anzac frigates 36 adventurer Fossett 36 Eglin AFB 36 MBARI 36 Commonage 36 Lituya 36 SARSAT 36 HMS Vanguard 36 Guajira Peninsula 36 Helios 2B 36 Cataraqui River 36 GLAST spacecraft 36 infrared scopes 36 radiotelescope 36 Seaway Terminal 36 Elmendorf AFB Alaska 36 Skyguard 36 HMCS Algonquin 36 desolate tundra 36 Blackswift 36 Leif Eriksson