Section 145(1) in The Navy (Pension) Regulations, 1964
(1)The widow of a person in the Indian Naval Reserve Forces (other than an officer) who dies while in the Indian Naval Reserve Forces due to causes neither attributable to nor aggravated by service in the said Forces, before completion of his combined Naval and Fleet reserve service shall be granted a gratuity that would have been paid had he been discharged at the end of his service in the Indian navy.