likewise provided that if a doctor appointed by the seafarer disagrees with the assessment, a third doctor may be agreed jointly between the employer and the seafarer whose decision shall be final and binding on both parties.   Petitioner did not question the findings of Dr. Pidlaoan and his recommendation.He questioned the doctor's competency and the correctness of his findings only when he filed the complaint against respondents before the Labor Arbiter, roughly 11 months after petitioner was examined by the doctor. Petitioner consulted his personal doctors only in July and August 2001, long after he had been examined by the company-designated physician.   cralawPetitioner's invocation of this Court's ruling in German Marine Agencies v. NLRC[25]militates against his claim for disability benefits. As explicitly laid in the said case, it is the company-designated physician who should determine the degree of disability of the seaman or his fitness to work, thus:   cralawx x x In order to claim disability benefits under the Standard Employment Contract, it is the company-designated physician who must proclaim that the seaman suffered a permanent disability, whether total or partial, due to either injury or illness, during the term of the latter's employment. x x x It is a cardinal rule in the interpretation of contracts that if the terms of a contract are clear and leave no doubt upon the intention of the contracting parties, the literal meaning of its stipulation shall control.There is no ambiguity in the wording of the Standard