SECOND DIVISION [G.R. No. 123882. November 16, 1998] JOE ASHLEY AGGA, VICTORINO MAKIMKIM, EDILBERTO EVANGELISTA, BENHUR SANTOS, RICHMOND CASTILLO, ROMEO AVILA, SEGUNDO GUADEZ, JR., OSCAR MALOLOY-ON, RICARDO BELDA, RUEL TONACAO, ROMULO DILAP-DILAP, JOSE SERGIO FRANCO, REYNALDO VILLAR, ROMULO DELA CRUZ, CAMILO CAIG, NICOLAS URSUA, MARTIN BAEZ, JR., MARIO SOSA and WOODY PADILLA petitioners, vs. NATIONAL LABOR RELATIONS COMMISSION, SUPPLY OILFIELD SERVICES, INC. and UNDERSEAS DRILLING, INC., respondents. DECISION PUNO, J.: Private respondent Supply Oilfield Services, Inc. (SOS) hired petitioners to work on board SEDCO/BP 471, a drillship owned and operated by private respondent Underseas Drilling, Inc. (UDI). The employment contracts ran for one year with petitioners enjoying two months' off with pay for every two months' duty. The contracts also provided that for service of 12 hours a day, 7 days a week in a two-shift 24-hour operation, petitioners would receive a fixed monthly compensation covering "basic rate, allowances, privileges, travel allowances and benefits granted by law during and after employment with the company." In a complaint filed with the Philippine Overseas Employment Administration (POEA), petitioners claimed that private respondents failed to pay them overtime pay, holiday pay, rest day pay, 13th month pay and night shift differential. They likewise alleged that private respondents did not comply with the mandatory insurance requirement of the rules governing overseas employment. They further averred that while private respondents made them use passports for overseas contract workers whenever they departed for, and returned from, overseas employment, they were also instructed to use seaman's books upon reaching port for transfer to, and while aboard, the oilrig. Petitioners opined that this practice entitled them to the benefits granted by law to both land-based workers and seamen. In their Answer and Position Paper, private respondents denied liability. They said that the benefits referred to in the employment contracts already included overtime pay, holiday pay, termination pay and 13th month pay. They likewise denied that petitioners were entitled to night shift differential since no proof was submitted to show that any of them, at any time, had actually worked from 10:00 p.m. to 6:00 a.m. In addition, private respondents belied petitioners' claim that they did not comply with the mandatory insurance requirement. They alleged that petitioners were insured with Blue Cross (Asia-Pacific) Insurance, Ltd. against death and permanent disability. Lastly, private respondents contended that petitioners, as offshore oilriggers, had nothing to do with manning a vessel or sea navigation. Hence, petitioners were merely landbased workers, not seamen.

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