Closely related service for renewal/ raise in grade

I am up for a renewal next year and have been working in the power industry for several years since going ashore. I would like to renew once more to keep my options open of going back to sea in the future. The problem is that I am short on sea time in the last 5 years to do this. One engineer that I sailed with said that they were able to apply time worked ashore as a marine diesel technician as sea time. My question is, according to 46 CFR 10.232 (g), closely related service can be defined as time instructing coast guard courses or working as a port engineer. Could submitting my time worked in steam plants, around boilers, turbines, etc. be considered as partial credit toward sea time? I am working under a stationary engineering license, which was attained by proving time served as a merchant marine engineer.