By DON BOHNING
Herald Latin America Editor

    The FBI arrested nine Miami Cuban exiles as suspects in a nationwide anti-Castro terrorist campaign conducted in the name of "Cuban Power" and directed countries dealing with Cuba.
    Dr. Orlando Bosch, a prominent and longtime exile activist and one of the nine arrested, was identified in a federal grand jury indictment as the mysterious "Ernesto" who had fired off threatening cablegrams to the heads of government in Mexico, Spain, and Britain.
    The cables warned of damage to ships and planes of each country if they insisted of continued trade with Cuba.
    Bosch in a five-count indictment was accused specifically of firing a .57-millimeter recoilless rifle at the Polish freighter "Polanica" while she was docked here last Sept. 16.
    Accused of helping him fire the weapon "with the intent of injure and endanger the safety of the vessel" were Barbaro Balan Garcia, 32, of 735 SW First St. and Jose Diaz Morejan, 26, of 621 SW Fifth St.  The shell hit the ship but only dented the hull in the early morning darkness.
    The indictment prompted a State Department apology to the Polish government and intensified the effort by local and federal agencies to smash Cuban Power.
    Some 36 agents in a coordinated effort, swooped down on the homes of the nine exiles early Friday morning in a climax to the weeks of investigation.  A grand jury had returned a sealed indictment against them Thursday night.
    Arrested in addition to Bosch, Balan and Diaz were:
    Andres Jorge Gonzalez, 36, of 51 NW 76th Ave.; Marco Rodriguez Ramos, 24, of 735 SW First St.; Jesus Dominguez Benitez, 27, of 2460 SW First Ave.; Paulino Mario Gutierrez Vioni, 45, of 1029 SW First Ave., the father of Luis; and Aimes Miranda Cruz, 39, of 218 SW 16th Ave., the only woman in the group.
    Bond was set at $50,000 each for Bosch, Balan, Diaz and Gonzalez; $10,000 for Rodriguez, $5,000 each for Benitez and Paulino Gutierrez; and $2,500 each for Luis Gutierrez and Miss Miranda.
    A bail reduction hearing was held before Federal Judge William O. Mehrtens Friday afternoon at the request of attorney Melvin Greenspan, representing all nine of the defendants.
    Mehrtens changed the $2,500 surety bond for Miss Miranda to a $2,500 personal recognizance bond, but rejected any change for the other eight.
    The government maintained that because all are members of Cuban Power they pose a danger to the community.
    All but Miss Miranda will still being held in Dade County jail late Friday.  An arraignment was expected soon before Judge Mehrtens, but no date was set.
    The bond order stipulated that if bond is posted the defendants shall be restricted to Dade and Broward counties and not be permitted to enter "Dodge Island, the Port of Miami, Port Everglades, Miami International Airport and Broward International Airport or any other airport or dock facility..."
    All nine were accused of "conspiracy" to damage foreign vessels with explosives.  Maximum penalty, if convicted on the charge, is $20,000 each or 25 years in prison, or both.
    Bosch, a 42-year-old exile pediatrician with five children, was the only one accused on all five counts in the indictment.  He was also charged on three counts of sending the threatening cablegrams to Gen. Francisco Franco of Spain, President Gustavo Diaz Ordaz of Mexico and Prime Minister Harold Wilson of Great Britain.
    Bosch, who has long headed the militant exile Insurrectional Revolutionary Recovery Movement (MIRR), faces up to a $21,000 fine or 26 years in jail or both if convicted.
    Two years ago he was acquitted in Miami of a federal extortion charge which included allegations of death threats, bombings and shooting attacks on fellow exiles.
    None of those indicted was charged in connection with the 40 assorted explosions that have rocked Dad County since the first of the year.
    But Bosch, Balan and Luis Gutierrez were linked Ricardo Morales Navarette, a Cuban who was charged earlier this year with bombing an exile store in Miami.  No details were given, other than that Bosch had "communicated instructions" to Morales Navarette on or about Aug. 27.
    The indictment charged that part of the conspiracy plan was to damage vessels of foreign registry docked at Dodge Island and elsewhere in South Florida by placing explosives in them aimed at damaging the ships and their cargo.
    Part of the conspiracy plan, according to the indictment, was to raise money through the publicity generated by the ship explosions.
    The clandestine Cuban Power group has publicly claimed responsibility for a series of Spanish, British and Japanese ship blasts in the United States, Canada and Puerto Rico.
    Last Sept. 28, a hooded figure who described himself as "Ernesto" staged a bizarre press conference in Miami to announce the appointment of Bosch as the Miami spokesman for Cuban Power.
    Bosch, who was not present, announced at his own press conference a week later that he accepted the designation.  At the same time, he announced a Cuban Power campaign to raise $1 million to fight Castro.
    FBI agents, when they rounded up nine early Friday morning, were also armed with search warrants for Bosch's house and car and Miss Miranda's residence.
    According to the warrants, they were looking for gun parts at Miss Miranda's house and typewriters and leaflets in Bosch's house and car.
    In an affidavit to obtain a search warrant for Miss Miranda's apartment, FBI agent Joseph Frechette said he had information from a confidential informant that of Sept. 15, the night before the Polancia incident, a .57-millimeter recoilless rifle was assembled at her home.
    Frechette's affidavit said four men were present and they constructed a jerry-built weapon with a coathanger for a makeshift from sight and which also had a makeshift trigger.
    Subsequently, according to the affidavit, two men who had been in the apartment went fishing near the Polish ship.  On Sept. 16, the day the vessel was fired on, agents recovered the same weapon nearby.
    In an affidavit for the search warrant of Bosch's house and car, Agents James Tucker said he had received information from Western Union that Bosch had sent cables signed "Ernesto."
    He said one had been sent to British Prime Minister Wilson saying that exiles had been responsible for the explosion May 5 aboard the British ship Granwood off Key West.