In 1960, the Grace Line sought to begin containerizing its South American cargo operations by converting the conventional freighters and
Santa Leonor into fully cellular
container ships. However, the effort was opposed to by the
longshoremen in New York and Venezuela, and the ships were repeatedly laid up idle. The ships were ultimately sold to the domestic container line
Sea-Land Service in 1964. Sea-Land immediately modified the two ships to carry its 35-foot containers.
Santa Eliana was temporarily renamed
Sea and
Santa Leonor became
Land. The ships were employed on the U.S. coastal and Puerto Rican trades.
The L and M ships L ships The Grace Line replaced the aging freighters and added six newly built freighters called the L ships.
M ships In 1963, Grace made a second attempt to containerize its South American trade when it ordered what was referred to as the M ships, which were: •
Santa Magdalena •
Santa Maria • ''Santa M'ariana'' •
Santa Mercedes The ships were combination passenger-cargo ships with partial cellular holds. Each ship could carry 125
first class passengers. However, they were no real gain as mixing conventional
breakbulk cargo (shipping goods loaded individually) and containers in the same ship was less efficient in terms of the operating economies than full
containerization (intermodal freight transport) was capable of.
Santa Magdalena, the first of the class, was delivered to Grace Line on February 4, 1965. File:Paper roll loaded on ship.jpg|An example of
breakbulk cargo File:Line3174 - Shipping Containers at the terminal at Port Elizabeth, New Jersey - NOAA.jpg|Example of shipping
containerization M ship design The ships were designed by
George G. Sharpe Company, naval architects and engineers. As an engineering company,
operations analysis (operations research) of the
trade route was made to determine: • Having trends analyzed • Having trends projected into the future.
Sale of the shipping company In December 1969, Grace Line was sold to
Prudential Lines for $44.5 million, with the merged company renamed
Prudential Grace Line. Spyros S. Skouras was elected president. A Pacific and Atlantic Division were created. The divisions were managed as follows: • Arthur C. Novacek, the last president of the Grace Line, headed the Atlantic Division. • Edmund J. Camuti, the former traffic vice president for the Prudential Line, headed the Pacific Division. == 1970s ==