Over long periods of time, well stabilized foreshore areas will tend to accrete, while unstabilized foreshores will tend to erode, leading to substantial changes in the shape of the coastline. These changes usually occur over periods of many years. Freak wave events such as tsunami, tidal waves, and storm surges may substantially alter the shape, profile and location of a beach within hours.
In 2017, 4.1 billion passengers have been carried by airlines in 41.9 million commercial scheduled flights (an average payload of 98 passengers), for 7.75 trillion passenger kilometres (an average trip of 1890 km) over 45,091 airline routes served globally. In 2016, air transport generated $704.4 billion of revenue in 2016, employed 10.2 million workers, supported 65.5 million jobs and $2.7 trillion of economic activity: 3.6% of the global GDP.[60]

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*3. Prices displayed based on purchase of a One-Way itinerary between OAK, SJC, SFO, SMF and HNL, ITO, KOA, LIH, OGG. Tickets must be booked between 4/12/2019 and 4/16/2019. Fares are available for travel from Oakland, CA or San Jose, CA to Hawaii 11/4/119 – 12/12/19 (Monday – Thursday), for travel from San Francisco, CA or Sacramento, CA to Hawaii 8/19/19 – 12/12/19 (Monday – Thursday). Blackout Dates: 11/21/19 – 11/24/19 to Hawaii and 11/29/19 – 12/2/19 from Hawaii. Travel must be on Hawaiian Airlines operated flights only. Fares are not valid on codeshare flights and subject to 1 month maximum stay as measured from departure from fare origin. Fares may not be available over all dates and fares on some dates may be higher. The number of seats available in this fare class during the travel period shown are limited and may change at any time without notice. Fares include government taxes and fees and carrier fees. Fares are non-refundable, non-transferrable, and non-endorsable. Other restrictions apply. Additional baggage charges may apply.
Airlines follow a corporate structure where each broad area of operations (such as maintenance, flight operations (including flight safety), and passenger service) is supervised by a vice president. Larger airlines often appoint vice presidents to oversee each of the airline's hubs as well. Airlines employ lawyers to deal with regulatory procedures and other administrative tasks.[86]
Analysis of the 1992–1996 period shows that every player in the air transport chain is far more profitable than the airlines, who collect and pass through fees and revenues to them from ticket sales. While airlines as a whole earned 6% return on capital employed (2–3.5% less than the cost of capital), airports earned 10%, catering companies 10–13%, handling companies 11–14%, aircraft lessors 15%, aircraft manufacturers 16%, and global distribution companies more than 30%. (Source: Spinetta, 2000, quoted in Doganis, 2002)
Among the first countries to have regular airlines in Latin America and the Caribbean were Bolivia with Lloyd Aéreo Boliviano,[57] Cuba with Cubana de Aviación, Colombia with Avianca (the first airline established in the Americas), Argentina with Aerolineas Argentinas, Chile with LAN Chile (today LATAM Airlines), Brazil with Varig, Dominican Republic with Dominicana de Aviación, Mexico with Mexicana de Aviación, Trinidad and Tobago with BWIA West Indies Airways (today Caribbean Airlines), Venezuela with Aeropostal, Puerto Rico with Puertorriquena; and TACA based in El Salvador and representing several airlines of Central America (Costa Rica, Guatemala, Honduras and Nicaragua). All the previous airlines started regular operations well before World War II. Puerto Rican commercial airlines such as Prinair, Oceanair, Fina Air and Vieques Air Link came much after the second world war, as did several others from other countries like Mexico's Interjet and Volaris, Venezuela's Aserca Airlines and others.
"In today's competitive world you cannot justify providing complimentary meals on a traditional business model. It simply does not pay for itself... which explains why essentially everybody has taken all that free food off the airplane. We're being illogical by actually investing heavily in this area... It's part of who we are, and it's what makes us different from everybody else."[99]
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