Question 421 Deck General

The correct answer is A) flame safety lamp. The flame safety lamp can be substituted for in the fireman's outfit on a cargo vessel, as it is an acceptable alternative to the required equipment. The flame safety lamp is used to detect the presence of flammable gases, which is an important safety feature for a fireman's outfit on a cargo vessel. The other options, such as a fire ax, rigid helmet, or flashlight, are not acceptable substitutes for the flame safety lamp in this context.