On the errand · Scope, watch, take back or end the errand. · it acts
Element 98
It returns the task: done, stuck, or out of its depth.
your turn · take the controls
The other half of the exchange is Take Over.
First known
Opened
1952Bendix autopilot monitor: when something unusual happens, it switches the autopilot off and warns the pilot by sound and light to take over.
See also: Eastern 401 (29 December 1972): altitude hold slipped off with no disconnect warning and no one took the controls (NTSB, 1973).
“Upon an uncommon occurrence, the monitoring system disables the automatic pilot system ... provides audible and visible warnings for the human pilot.”
Eastern 401 is the famous case, but there the automation let go quietly, so it is a failed hand-back. The act itself, giving control back with a warning, is two decades older.
Someone opened the dated document itself. The source.
- ReadingValue
Specimen № 98 — operate freely
Let it make the calls. Each one comes back stamped: see what it asks of you.
Fig. 98 — Hand Back
000 readings · idle
On the errand: its twin
The two series line up in pairs. Each act on a guess sits above the act that does the same thing to an errand, so Shrug and Hand Back are one move made on two kinds of thing.
Bodies
The act stays put while the hardware changes. These are some of the forms Hand Back takes.
- your turn
- take the controls
From the 2021 table
This was a tile of its own. On this table it is a form of Hand Back, and its old address lands here.
- Handoff ZoneRenamedThe same act, under a name that says what it does.