This is an extract from the local news site:

A total of 50 firefighters attended a blaze at a garden centre.

Crews from Shipley and Ilkley were among the six appliances who attended a fire at Stephen H Smith's Garden & Leisure...

Source: T&A, 19-Jul-17, emphasis is mine.

I understand that the word appliances in this context relates to fire engines and equipment, but to me the sentence seems awkward.

My question is, is the word appliances being used correctly in this sentence?