The basic first alarm assignment is three engines, two ladders, and a battalion chief.
The 10-75 assignment is four engines, two ladders plus a FAST ladder, two battalions, and since 2015 a division chief, plus a rescue, squad, and RAC unit. In effect, the 10-75 and the All Hands signals have been combined.
The 10-75 is a fire OR emergency that requires the response of the additional resources (4th engine, fast truck etc)All Hands is also used for 10-76 and 10-77 but it definitely does not change the responding apparatus that are assigned at time of 10-75, 10-76, 10-77.
Also, 10-75, 10-76, 10-77 is only reserved for fires. There can be an All Hands for other non-fire incidents which, from my understanding, would also assign the additional units (4th Engine, FAST truck, 2nd Battalion Chief, Division Chief, Rescue, Squad and RAC)
Very cool info! brother.Another question is the origin of the obviously nautical phrase "All Hands". I believe it is found in the City of London. Similar to the U.S., initial organized firefighting involved insurance companies. And pretty much the only things worth insuring were along the River Thames. The obvious manpower available would have been dock workers and "watermen".
On January 1, 1833 the London Fire Engine Establishment (with 19 stations, two fire floats, and 80 men) opened for business. Ex-sailors were the preferred firefighters. "Seamen are to be preferred as they are taught to obey orders and the night and day watches and the uncertainty of the occupation are more similar to their former habits than to those of other men of the same rank in life."
This requirement followed in to the Metropolitan Fire Brigade (est. 1/1/1866). It was officially deleted in 1889. Unofficially, it continued until World War II. Until London fire apparatus were fitted with bells in 1903, firemen used the rope hauling seaman's shanty call of "Hi-Hi-Hi" to warn traffic.
Even today the naval traditions can be found in London Fire Stations. Six bells sound "roll call", "stand-down", "muster all hands", and "off duty". Tea is the favored drink. Members belong to "watches" (shifts) and are referred to as "hands".
Remember where all this came from when you're "standing fast".