Alcatraz Cruises’ Hornblower Hybrid is a Model of Alternative Energy Innovation
Hornblower Cruises & Events, Alcatraz Cruises’ parent company, boasts the marine industry’s only hybrid passenger ferry fleet in North America. The first hybrid ferry was introduced to San Francisco Bay in 2009 by Alcatraz Cruises, providing transportation to Alcatraz Island in accordance with the company’s concession contract with the National Park Service.
Since that time, the remaining two primary vessels in the Alcatraz Cruises’ fleet have been hybridized, making Alcatraz Cruises the only passenger vessel company in North America with a fleet of hybrid vessels.
The continuing development of marine industry hybridization, as well as hydrogen fuel cell technology, demonstrate Hornblower’s commitment to innovation, marine conservation, environmental stewardship and sustainability.
According to Terry MacRae, CEO of Alcatraz Cruises and Hornblower Cruises & Events, “The Hornblower Hybrid fleet is an example of our company’s goal of becoming the greenest concessioner in the National Park Service. With this Hornblower Hybrid fleet, we are now being recognized as a model of environmental innovation.”
Alcatraz Cruises’ Hybrid fleet uses power generated by ten‐foot‐tall wind turbines and photovoltaic solar arrays covering the awning on the top decks. That power is converted and stored in battery banks that then power the navigation tools, lighting and other electronics on board the vessels. Excess power is stored in the main propulsion battery banks.
In addition to solar panels and wind turbines, the hybrid fleet has Tier 2 marine diesel engines. These cleaner fuel‐efficient engines reduce the amount of diesel fuel used, minimize emissions and significantly reduce the company’s overall carbon footprint. The customized drive system allows the captain to monitor the energy needs of the vessel and select the most efficient power sources. For example, when the boat is idle at the dock, the engines will shut off and the motors will run off of energy stored in the battery banks.
The Alcatraz Cruises’ hybrid fleet has redefined the profile of vessels on San Francisco Bay. As multipurpose vessels within the fleet, these boats ferry visitors to Alcatraz Island and Angel Island as well as taking school groups and other passengers on cruises around the Bay.
Alcatraz Cruises considered several different designs before selecting this particular system. Of greatest importance was the need to build a system that maximized the weather patterns on San Francisco Bay. This vessel system has been designed to be modified as technologies are improved or refined.