航空用語集
255255 の用語( 12 カテゴリ)
空港インフラ (25)
飛行場灯火 (AGL: Airfield Lighting)
The system of lights on runways, taxiways, and aprons that guide aircraft during low visibility
空港消防署 (ARFF: Airport Fire Station)
Airport Rescue and Firefighting facility providing emergency response for aircraft incidents
エプロン (Apron)
The area of an airport where aircraft are parked, loaded, fueled, and boarded
手荷物処理システム (BHS: Baggage Handling System)
The network of conveyors and sorting equipment that moves luggage within an airport
ジェットブラストフェンス (Blast Fence)
A barrier designed to redirect jet engine exhaust away from people and structures on the apron
貨物ターミナル (Cargo Terminal)
A specialized airport facility for handling freight and mail shipments
コンコース (Concourse)
A section of a terminal containing gates for aircraft boarding and deplaning
管制塔 (TWR: Control Tower)
The facility at an airport from which air traffic controllers direct aircraft movements
除氷エリア (De-Icing Pad)
A designated area where aircraft are treated with de-icing fluid before takeoff in cold weather
移設しきい値 (Displaced Threshold)
A threshold not located at the beginning of the full-strength runway surface
固定基地運航事業者 (FBO: Fixed-Base Operator)
A commercial business granted the right to operate at an airport providing aeronautical services
燃料貯蔵施設 (Fuel Farm)
An airport facility that stores and distributes aviation fuel to aircraft
搭乗ゲート (Gate)
A designated area at an airport where passengers board and deplane aircraft
ハンガー (Hangar)
An enclosed building structure to hold aircraft for maintenance or storage
待機ベイ (Holding Bay)
A designated area near the runway where aircraft wait before receiving takeoff clearance
ILSローカライザーアンテナ (LOC: ILS Localizer Antenna)
A ground-based radio transmitter providing horizontal guidance for precision approaches
ボーディングブリッジ (Jet Bridge)
An enclosed, movable connector between an airport terminal gate and an aircraft door
PAPI (PAPI)
Precision Approach Path Indicator — a visual aid providing glidepath guidance during approach
滑走路 (RWY: Runway)
A defined rectangular surface on an airport prepared for aircraft takeoff and landing
滑走路端安全区域 (RESA: Runway End Safety Area)
An area beyond the runway end intended to reduce risk of damage to aircraft undershooting or overrunning
滑走路しきい値 (Runway Threshold)
The beginning of the usable portion of a runway for landing
停止帯 (SWY: Stopway)
An area beyond the takeoff runway designated for decelerating an aircraft during an aborted takeoff
誘導路 (TWY: Taxiway)
A defined path on an airport for aircraft to travel between runways and aprons
ターミナル (Terminal)
A building at an airport where passengers transfer between ground and air transportation
吹き流し (Windsock)
A conical textile tube mounted on an airport that indicates wind direction and approximate speed
空港コードと分類 (18)
空港カテゴリ (Airport Category)
The classification system used to categorize airports by size, traffic, and facilities
空港標高 (ELEV: Airport Elevation)
The highest point of an airport's usable landing area measured above mean sea level
空港基準点 (ARP: Airport Reference Point)
The designated geographical center of an airport used for identification and coordination
FAA位置識別子 (FAA LID: FAA Location Identifier)
A 3-4 character identifier used by the FAA for airports and navigation aids in the US
フォーカスシティ (Focus City)
An airport where an airline operates significant point-to-point service without full hub operations
一般航空空港 (GA: General Aviation Airport)
An airport primarily serving non-scheduled and private aircraft operations
ヘリポート (Heliport)
An area of land or a structure used for helicopter takeoff, landing, and parking
ハブ空港 (Hub Airport)
An airport that serves as a transfer point for connecting flights, typically for one or more airlines
IATAコード (IATA: IATA Code)
A three-letter code assigned by IATA to identify airports worldwide
ICAOコード (ICAO: ICAO Code)
A four-character alphanumeric code assigned by ICAO for airports and airfields
国際空港 (International Airport)
An airport with customs and immigration facilities that handles international flights
大規模空港 (Large Airport)
An airport with substantial scheduled airline operations and high passenger volume
中規模空港 (Medium Airport)
An airport with moderate levels of commercial and general aviation activity
補完空港 (Reliever Airport)
An airport designated to reduce congestion at a major commercial airport
定期便運航 (Scheduled Service)
Regularly operated commercial flights that run on published timetables
水上機基地 (Seaplane Base)
A facility on water for the takeoff, landing, and servicing of seaplanes and amphibious aircraft
スロット管理空港 (Slot-Controlled Airport)
An airport where takeoff and landing slots are allocated to airlines due to capacity constraints
小規模空港 (Small Airport)
An airport with limited aviation activity, often serving general aviation
飛行運航 (22)
ブロック燃料 (Block Fuel)
The total fuel required for a flight from engine start to engine shutdown
ブロックタイム (Block Time)
The total time from gate departure to gate arrival, including taxiing and airborne time
上昇 (Climb)
The phase of flight where an aircraft gains altitude after takeoff
横風着陸 (Crosswind Landing)
A landing technique used when wind blows perpendicular to the runway direction
巡航 (Cruise)
The phase of flight at a relatively constant altitude and speed between climb and descent
降下 (Descent)
The phase of flight where an aircraft reduces altitude as it approaches the destination
ダイバート (Diversion)
A change in route to land at an airport other than the intended destination
ETOPS (ETOPS)
Extended-range Twin-engine Operations — rules governing how far twin-engine aircraft can fly from airports
フェリーフライト (Ferry Flight)
A non-revenue flight for repositioning an aircraft to another airport
フレア (Flare)
A pitch-up maneuver performed just before touchdown to reduce descent rate
フライトプラン (FPL: Flight Plan)
A document filed with air traffic control detailing the intended route, altitude, and timing of a flight
ゴーアラウンド (Go-Around)
An aborted landing where the aircraft applies full power and climbs away from the runway
大圏航路 (GCR: Great Circle Route)
The shortest path between two points on the Earth's surface, commonly used in long-haul aviation
ホールディングパターン (Holding Pattern)
A racetrack-shaped flight path used to delay an aircraft's approach to an airport
着陸 (Landing)
The final phase of flight where an aircraft descends to the runway surface
ポジショニングフライト (Positioning Flight)
A flight to move crew or aircraft to a location needed for operational purposes
等角航路 (Rhumb Line)
A path crossing all meridians at the same angle, appearing straight on a Mercator projection
ローテーション (Vr: Rotation (Vr))
The speed at which the pilot pulls back on the controls to lift the aircraft's nose during takeoff
離陸 (Takeoff)
The phase of flight in which an aircraft accelerates and becomes airborne
テクニカルストップ (Technical Stop)
An intermediate landing for refueling or maintenance rather than passenger purposes
ターンアラウンドタイム (Turnaround Time)
The time required to unload, service, and reload an aircraft between arrival and departure
離陸時刻 (Wheels-Up Time)
The moment an aircraft lifts off the runway and becomes fully airborne
旅客体験 (22)
空港ラウンジ (Airport Lounge)
A premium waiting area offering comfortable seating, food, drinks, and amenities
自動旅券審査 (APC: Automated Passport Control)
Self-service kiosks that expedite immigration processing for eligible passengers
手荷物受取所 (Baggage Claim)
The area in an airport where arriving passengers collect their checked luggage
搭乗 (Boarding)
The process of passengers entering the aircraft before departure
搭乗券 (Boarding Pass)
A document providing authorization to board an aircraft for a specific flight
機内持込手荷物 (Carry-On Baggage)
Luggage small enough to be stowed in the overhead bin or under the seat
受託手荷物 (Checked Baggage)
Luggage surrendered at check-in to be transported in the aircraft's cargo hold
チェックイン (Check-In)
The process of confirming a passenger's presence and obtaining a boarding pass
税関 (Customs)
Government checkpoints where goods brought into a country are inspected and duties assessed
搭乗拒否 (Denied Boarding)
When a passenger with a confirmed reservation is not allowed to board due to overbooking
免税店ショッピング (Duty-Free Shopping)
Retail outlets in international departure areas exempt from local taxes and duties
グローバルエントリー (Global Entry)
A US Customs program for expedited clearance for pre-approved, low-risk travelers
入国審査 (Immigration)
Border control points where passports and visas are checked for international arrivals
最低乗継時間 (MCT: Minimum Connection Time)
The shortest allowed time between connecting flights at a specific airport
オーバーブッキング (Oversale (Overbooking))
The airline practice of selling more tickets than available seats to account for no-shows
旅客予約記録 (PNR: Passenger Name Record)
A record in the airline reservation system containing passenger itinerary and contact information
事前入国審査 (Pre-Clearance)
US customs and immigration processing completed at a foreign airport before departure
優先搭乗 (Priority Boarding)
Early aircraft boarding privilege given to premium class passengers or loyalty program members
保安検査 (Security Screening)
The process of checking passengers and baggage for prohibited items before entering secure areas
乗り継ぎ (Transfer)
Changing from one flight to another at a connecting airport
トランジット(制限区域) (Transit (Airside))
Remaining in the secure area of an airport between connecting flights without passing through immigration
単独搭乗未成年者 (UM: Unaccompanied Minor)
A child traveling without an adult passenger who receives special airline supervision
航空会社運営 (20)
航空アライアンス (Airline Alliance)
A partnership of airlines that cooperate on routes, frequent flyer programs, and lounge access
有効座席キロ (ASK: Available Seat Kilometer)
The total passenger capacity of an airline measured in seats multiplied by distance flown
チャーター航空会社 (Charter Airline)
An airline that operates flights booked by travel agencies or tour operators rather than scheduled services
コードシェア (Codeshare)
An agreement where two or more airlines share the same flight under different flight numbers
ドライリース (Dry Lease)
An aircraft lease providing only the aircraft, without crew or operational support
フィーダー航空会社 (Feeder Airline)
A regional airline that transports passengers to and from a larger carrier's hub
フラッグキャリア (Flag Carrier)
An airline that is designated to represent and carry the flag of its home country
既得権 (Grandfather Rights)
The principle allowing airlines to retain airport slots based on historical usage
ハブ&スポークモデル (Hub-and-Spoke Model)
An airline network model routing most flights through a central hub airport
インターライン協定 (Interline Agreement)
An agreement allowing passengers to use a single ticket for journeys involving multiple airlines
搭乗率 (LF: Load Factor)
The percentage of available seats on an aircraft that are filled with passengers
格安航空会社 (LCC: Low-Cost Carrier)
An airline operating with a lower cost structure and offering lower fares than full-service carriers
oneworld
A global airline alliance founded in 1999, members include American Airlines, British Airways, Qantas
ポイント・トゥ・ポイントモデル (Point-to-Point Model)
An airline network model where flights connect cities directly without routing through a hub
有償旅客キロ (RPK: Revenue Passenger Kilometer)
A measure of airline traffic calculated as passengers carried multiplied by distance flown
発着枠(スロット) (Slot (Airport Slot))
A scheduled time allocation for an airline to use airport infrastructure for takeoff or landing
Star Alliance
The world's largest airline alliance founded in 1997, members include United, Lufthansa, ANA
超格安航空会社 (ULCC: Ultra-Low-Cost Carrier)
An airline with the most stripped-down fares, charging separately for nearly all services
ウェットリース (Wet Lease)
An aircraft lease that includes the aircraft, crew, maintenance, and insurance (ACMI)
イールド (Yield)
Average revenue per passenger-kilometer, a key airline profitability metric
航空機と工学 (24)
補助電源ユニット (APU: Auxiliary Power Unit)
A small engine on the aircraft that provides electrical power and air conditioning on the ground
アビオニクス (Avionics)
The electronic systems used in aircraft including navigation, communication, and flight management
エア抜き (Bleed Air)
Compressed air extracted from the jet engine compressor used for cabin pressurization and de-icing
複合材料 (Composite Materials)
Advanced lightweight materials (carbon fiber, fiberglass) used in modern aircraft construction
尾部 (テールセクション) (Empennage (Tail Section))
The tail assembly of an aircraft including horizontal stabilizer, vertical fin, and control surfaces
ETOPS認定 (ETOPS Rating)
The certified maximum time a twin-engine aircraft may fly from a suitable diversion airport
運航管理システム (FMS: Flight Management System)
A computer system that automates navigation, performance optimization, and flight planning
フライバイワイヤー (FBW: Fly-By-Wire)
A system replacing manual flight controls with electronic signals sent to actuators
胴体 (Fuselage)
The main body structure of an aircraft that holds crew, passengers, and cargo
着陸装置 (Landing Gear)
The undercarriage system of wheels, struts, and brakes supporting the aircraft on the ground
マッハ数 (M: Mach Number)
The ratio of the aircraft's speed to the speed of sound in the surrounding atmosphere
最大離陸重量 (MTOW: Maximum Takeoff Weight)
The maximum weight at which the pilot is allowed to attempt takeoff
ナローボディ機 (Narrow-Body Aircraft)
A single-aisle aircraft typically seating 100-240 passengers for short/medium-haul flights
加圧 (Pressurization)
The process of maintaining a safe atmospheric pressure inside the aircraft cabin at high altitudes
航続距離(航空機) (Range (Aircraft))
The maximum distance an aircraft can fly without refueling
リージョナルジェット (RJ: Regional Jet)
A small jet aircraft typically seating 50-100 passengers for short-haul routes
サービス上限 (Service Ceiling)
The maximum altitude at which an aircraft can sustain a specified rate of climb
失速速度 (Vs: Stall Speed)
The minimum speed at which an aircraft can maintain level flight
交通衝突回避システム (TCAS: Traffic Collision Avoidance System)
An airborne system that detects other transponder-equipped aircraft and provides resolution advisories
ターボファンエンジン (Turbofan Engine)
A jet engine that uses a ducted fan to produce thrust, the most common type on commercial aircraft
ターボプロップ (Turboprop)
An aircraft powered by a gas turbine engine driving a propeller, efficient at lower speeds
ターボシャフトエンジン (Turboshaft Engine)
A gas turbine engine optimized to produce shaft power, primarily used in helicopters
ワイドボディ航空機 (Wide-Body Aircraft)
A twin-aisle aircraft typically seating 200-600 passengers for medium/long-haul flights
ウィングレット (Winglet)
A vertical or angled extension at the tip of an aircraft wing that reduces drag
航空気象 (18)
雲底高度 (Ceiling)
The height of the lowest layer of clouds covering more than half the sky
晴天乱気流 (CAT: Clear Air Turbulence)
Turbulence occurring in cloudless areas, often near jet streams, invisible to radar
横風 (Crosswind)
A wind blowing perpendicular to the direction of travel or runway alignment
霧 (Fog)
Visibility-reducing water droplets suspended near the surface, a major cause of airport delays
逆風 (Headwind)
A wind blowing directly opposite to the direction of aircraft travel, reducing ground speed
アイシング (Icing)
The accumulation of ice on aircraft surfaces during flight through supercooled water droplets
ジェットストリーム (Jet Stream)
A narrow band of strong winds (100-200 kt) at high altitudes affecting flight times and routing
METAR (METAR)
Aviation Routine Weather Report — a standardized format for reporting current weather conditions
パイロットレポート (PIREP: Pilot Report)
An in-flight weather report provided by a pilot describing actual conditions encountered
QNH (QNH)
The atmospheric pressure adjusted to mean sea level, used for altimeter setting
SIGMET (SIGMET)
Significant Meteorological Information — a warning of severe weather hazardous to all aircraft
追い風 (Tailwind)
A wind blowing in the same direction as the aircraft's travel, increasing ground speed
飛行場予報 (TAF: Terminal Aerodrome Forecast)
A weather forecast for the area around an airport, typically covering a 24-30 hour period
雷雨(積乱雲) (CB: Thunderstorm (Cumulonimbus))
A convective weather system producing lightning, turbulence, hail, and heavy precipitation
乱気流 (Turbulence)
Irregular atmospheric motion causing sudden changes in an aircraft's altitude or attitude
可視性 (VIS: Visibility)
The greatest distance at which prominent objects can be identified with the unaided eye
火山灰雲 (Volcanic Ash Cloud)
Fine rock particles from volcanic eruptions that can damage jet engines and aircraft systems
ウィンドシアー (Wind Shear)
A sudden change in wind speed or direction over a short distance, hazardous during takeoff and landing
安全と規制 (22)
耐空証明書 (Airworthiness Certificate)
An official document certifying that an aircraft meets safety standards and is fit to fly
バードストライク (Bird Strike)
A collision between an airborne animal and an aircraft, posing risk to engines and windscreens
ブラックボックス (フライトレコーダー) (FDR/CVR: Black Box (Flight Recorder))
The flight data recorder and cockpit voice recorder that capture flight parameters and audio
CFIT(制御下飛行による地表衝突) (CFIT: Controlled Flight Into Terrain)
An accident where an airworthy aircraft is flown into terrain, water, or an obstacle
乗組員リソース管理 (CRM: Crew Resource Management)
Training methodology that improves teamwork, communication, and decision-making among flight crew
緊急避難 (Emergency Evacuation)
The rapid deployment of passengers from an aircraft via emergency exits and slides
非常口 (Emergency Exit)
A specially designed door or window on an aircraft that can be opened quickly for evacuation
強化された GPWS (EGPWS: Enhanced GPWS)
An advanced terrain awareness system combining GPS data with a terrain database
欧州連合航空安全局 (EASA: European Union Aviation Safety Agency)
The EU agency responsible for civil aviation safety regulation
連邦航空局 (FAA: Federal Aviation Administration)
The US government agency responsible for regulating civil aviation
消火システム (Fire Suppression System)
Aircraft systems designed to detect and extinguish fires in engines, cargo holds, and lavatories
地上接近警報システム (GPWS: Ground Proximity Warning System)
An aircraft system that alerts pilots when the aircraft is in dangerous proximity to terrain
国際航空運送協会 (IATA: International Air Transport Association)
The trade association representing airlines worldwide, managing codes and standards
国際民間航空機関 (ICAO: International Civil Aviation Organization)
The UN specialized agency managing international civil aviation standards and regulations
救命胴衣 (Life Vest)
A personal flotation device stored under each aircraft seat for use in water emergencies
MAYDAY
The international distress signal indicating grave and imminent danger requiring immediate assistance
航空情報公示通報 (NOTAM: Notice to Air Missions)
A notice filed with aviation authorities to alert pilots of hazards or changes along a flight route
PAN-PAN
The international urgency signal indicating a condition requiring assistance but not immediate danger
滑走路進入 (Runway Incursion)
Any occurrence involving unauthorized presence of an aircraft, vehicle, or person on a runway
安全管理体制 (SMS: Safety Management System)
A systematic approach to managing aviation safety including organizational structures and policies
運輸保安局 (TSA: Transportation Security Administration)
The US agency responsible for security of transportation systems, particularly airports
航跡乱気流 (Wake Turbulence)
Air disturbance caused by an aircraft's wingtip vortices, hazardous to following aircraft
航空交通管制 (20)
航空管制 (ATC: Air Traffic Control)
The ground-based service that directs aircraft on the ground and in the air to maintain safe separation
アプローチコントロール (APP: Approach Control)
The ATC facility responsible for aircraft in the terminal area around an airport
エリアコントロールセンター (ACC: Area Control Center)
The ATC facility responsible for aircraft in en-route airspace between terminal areas
自動従属監視ブロードキャスト (ADS-B: Automatic Dependent Surveillance-Broadcast)
A surveillance technology where aircraft broadcast GPS position and other data
自動ターミナル情報サービス (ATIS: Automatic Terminal Information Service)
A continuous broadcast of recorded airport information including weather, runways, and NOTAMs
管制許可 (Clearance)
An authorization from ATC for an aircraft to proceed under specified conditions
コントローラーとパイロットのデータリンク (CPDLC: Controller-Pilot Data Link)
A text-based communication system between pilots and ATC supplementing voice radio
飛行進行票 (Flight Progress Strip)
A paper or electronic record displaying essential information about an individual flight
フロー制御 (Flow Control)
ATC measures to regulate the rate of aircraft entering a sector or airport to prevent overload
地上管制 (GND: Ground Control)
The ATC position responsible for aircraft and vehicles on airport taxiways and ramps
地上停止 (Ground Stop)
A traffic management procedure halting departures to a specific airport
ハンドオフ (Handoff)
The transfer of radar identification and communication between ATC sectors or facilities
流量調整 (Metering)
The controlled timing of aircraft to manage arrival flow at busy airports
レーダー (Radar)
Radio detection and ranging technology used to track aircraft positions and weather
無線通信 (Radio Communication)
Voice communication between pilots and ATC using VHF or HF radio frequencies
SELCAL (SELCAL)
Selective Calling — a system that alerts a specific aircraft that a ground station wants to communicate
管制間隔 (Separation)
The minimum required spacing between aircraft to prevent collision
進入・離陸の順序付け (Sequencing)
The process of arranging arriving aircraft in an orderly line for approach and landing
タワーコントロール (TWR: Tower Control)
The ATC position responsible for aircraft on or near the runway and in the immediate airport area
ベクタリング (Vectoring)
ATC directing an aircraft to fly specific headings for traffic sequencing or separation
旅行計画 (22)
特典航空券 (Award Flight)
A flight booked using frequent flyer miles or points rather than money
キャビンクラス (Cabin Class)
The service tier on an aircraft: Economy, Premium Economy, Business, or First Class
乗り継ぎ便 (Connecting Flight)
A flight that requires changing aircraft at an intermediate airport
デッドヘッド便 (Dead-Head)
An airline crew member traveling as a passenger to reach their next working assignment
直行便 (Direct Flight)
A flight that does not require a change of aircraft, but may include intermediate stops
電子ビザ (e-Visa: Electronic Visa)
A visa obtained through an online application before travel
アイ・イン・ザ・スカイ・フライト (Eye-in-the-Sky Flight)
A westbound daytime long-haul flight that appears to chase the sun
運賃クラス(予約コード) (Fare Class (Booking Code))
A letter code identifying the fare type and conditions of a ticket
マイレージプログラム (FFP: Frequent Flyer Program)
An airline loyalty program rewarding regular travelers with miles, points, and elite benefits
時差ぼけ (Jet Lag)
Fatigue and disorientation from rapid travel across multiple time zones
乗り継ぎ (Layover)
A short wait between connecting flights, typically under 24 hours
複数都市の旅程 (Multi-City Itinerary)
A travel itinerary visiting multiple destinations before returning home
直行便 (Nonstop Flight)
A flight from origin to destination without any intermediate stops
片道航空券 (One-Way Ticket)
A ticket for travel in one direction only, without a return flight
オープンジョー (Open Jaw)
An itinerary where the departure city differs from the arrival city on the return trip
レッドアイ・フライト (Red-Eye Flight)
An overnight flight departing late at night and arriving early the next morning
有償便 (Revenue Flight)
A flight booked with cash payment as opposed to an award (miles-based) booking
往復 (Round Trip)
A journey from an origin to a destination and back to the origin
途中降機 (Stopover)
A planned break in a journey lasting 24 hours or more at an intermediate point
通過ビザ (Transit Visa)
A visa required for passing through a country's airport while connecting to another destination
旅行保険 (Travel Insurance)
Insurance coverage for unexpected events during travel including cancellation and medical emergencies
到着ビザ (VOA: Visa on Arrival)
A visa obtained at the destination airport's immigration counter rather than in advance
航空地理 (20)
方位 (Bearing)
The horizontal direction from one point to another, measured in degrees from true north
大陸空域 (Continental Airspace)
Airspace over a continent's landmass, typically better served by radar and communications
協定世界時 (UTC: Coordinated Universal Time)
The primary time standard for regulating clocks and aviation worldwide (also called Zulu time)
飛行通路 (Flight Corridor)
A designated airspace pathway commonly used for routing flights between regions
大圏距離 (GCD: Great Circle Distance)
The shortest distance between two points on Earth, following the curvature of the globe
半球 (Hemisphere)
One half of the Earth divided by the equator (N/S) or Prime Meridian (E/W)
国際日付変更線 (IDL: International Date Line)
An imaginary line roughly along the 180° meridian where the calendar date changes
カンガルールート (Kangaroo Route)
The air route between Australia and the United Kingdom, historically via multiple stops in Asia
ノット (kt: Knot)
A unit of speed equal to one nautical mile per hour, used in aviation and maritime
緯度 (Latitude)
The angular distance north or south of the equator, measured in degrees
経度 (Longitude)
The angular distance east or west of the Prime Meridian, measured in degrees
磁気偏差 (Magnetic Variation)
The angular difference between true north and magnetic north at a given location
海里 (NM: Nautical Mile)
A unit of distance equal to one minute of latitude, approximately 1.852 km
海洋空域 (Oceanic Airspace)
Airspace over oceans where radar coverage is limited, requiring procedural separation
極地ルート (Polar Route)
An air route passing near the North or South Pole, shortening distances between certain cities
法定マイル (SM: Statute Mile)
A unit of distance equal to 5,280 feet or approximately 1.609 km
タイムゾーン (Time Zone)
A geographic region observing a uniform standard time, typically offset from UTC
大西洋横断ルート (Transatlantic Route)
An air route crossing the Atlantic Ocean, connecting Europe/Africa with the Americas
太平洋横断航路 (Transpacific Route)
An air route crossing the Pacific Ocean, connecting Asia/Oceania with the Americas
北回帰線 (Tropic of Cancer)
The northernmost latitude (23.5°N) where the sun can be directly overhead