Controlled descent self-retracting lanyard

1. A system comprising:

a self-retracting lanyard having a main body and a retractable line coupled to the main body so as to be extendible and retractable relative to the main body and to be restricted from extending relative to the main body in response to a user of the self-retracting lanyard falling; and

a non-transitory program storage medium on which are stored instructions executable by a processor or programmable circuit to perform operations comprising:

receiving a controlled descent initiation command in response to operation by a user of a manual control associated with the self-retracting lanyard; and

instructing a wireless transmitter to transmit a controlled descent initiation signal in response to receipt of the controlled descent initiation command, the controlled descent initiation signal initiating a controlled descent of the retractable line relative to the main body.

2. The system of claim 1 , further comprising:

a mobile device including the non-transitory program storage medium,

the processor or programmable circuit, and the wireless transmitter.

3. The system of claim 2 , wherein the manual control includes a touch screen, button, switch, motion sensor, or camera of the mobile device.

4. The system of claim 2 , further comprising a peripheral device connectible to the mobile device and including the manual control, wherein the manual control includes a lever, switch, button, or motion sensor.

5. The system of claim 2 , further comprising a dock for holding the mobile device, the dock adapted to be engageable with the retractable line.

6. The system of claim 1 , wherein the main body includes an actuator including a wireless receiver, the actuator arranged to actuate a controlled descent switch that initiates the controlled descent in response to receipt of the controlled descent initiation signal by the wireless receiver.

7. The system of claim 1 , further comprising:

a housing adapted to be engageable with the retractable line;

wherein the manual control is disposed on the housing.

8. The system of claim 7 , wherein the housing is a clam-shell housing including two bodies pivotally coupled to each other.

9. The system of claim 7 , wherein the housing is adapted to be circumferentially engageable with the retractable line.

10. The system of claim 7 , wherein the housing includes a housing body and a central channel about which the housing body is located, the housing being adapted to allow the retractable line to reside within the central channel when the housing is engaged with the retractable line.