An aircraft having an augmented reality flight control system integrated with and operable from the pilot seat and an associated pilot headgear unit, wherein the flight control system is supplemented by flight-assisting artificial intelligence and geo-location systems is presented. The present disclosure includes an augmented reality flight control system incorporating real-world objects with virtual elements to provide relevant data to a pilot during aircraft flight. A translucent substrate is disposed in the pilot's field of view such that the pilot can see therethrough, and observe virtual elements displayed on the substrate. The system includes a headgear that is worn by the pilot. A flight assistance module is configured to receive data related to the aircraft and provide predictive assistance to the pilot during flight based on the received data based in part on a pilot profile having preferences related to the pilot.

A hydration system including a fluid reservoir, a fluid path in communication with the reservoir, and a magnetic quick connect interposed in the fluid path is disclosed. A fluid delivery system for a hydration system is also disclosed that includes a magnetic quick connect interposed in a fluid delivery path of the delivery system. The magnetic quick connect can also be used in a wide variety of fluid delivery systems. A kit for forming a fluid delivery system for a hydration system is also disclosed, as are various components of a hydration system.

An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

A helmet comprising: inner and outer shells configured to slide relative to each other; and a connector connecting the inner and outer shells so as to allow the inner and the outer shells to slide relative to each other, the connector comprising: an attachment part attached to one of the inner shell and the outer shell; wherein: the attachment part comprises one or more protrusions and the inner or outer shell attached to the attachment part comprises one or more channels into which the protrusions extend, the protrusions and channels are configured such that the protrusions can move within the channels in an extension direction of the protrusions, during sliding of the inner and outer shells relative to each other, and the protrusions comprise an abutment member configured to abut an abutment portion of the channel to prevent the protrusion leaving the channel.

A screen device includes a combiner that shows an image projected by a helmet at the helmet; and a vertical movement mechanism attached to a shell of the helmet, wherein the vertical movement mechanism supports the combiner so that the combiner is movable in a vertical direction and so that an inclination of the combiner is changeable with respect to the vertical direction.

A helmet includes a helmet body and a clip coupled to the helmet body, for retaining a helmet accessory such as a face cage. The clip comprises a first clip section partly defining an aperture into which a part of the helmet accessory can be received and a second clip section located opposite the first clip section. The second clip section has a first end and a second end, the first end partly defining the aperture into which the part of the helmet accessory can be received, and the second end being coupled to the helmet body. The second clip section further includes a ramped surface that can be depressed to provide access to or from the aperture by the part of the helmet accessory. Also disclosed is a clip for retaining a helmet accessory.

A retention system comprises a shroud configured to be coupled to a helmet. The shroud includes a front surface and a rear surface and the shroud is configured to be coupled to an accessory device. A flexible element is coupled to the shroud and configured to at least partially secure the accessory device to the shroud. The flexible element extends through the front surface of the shroud.

A retention system comprises a shroud configured to be coupled to a helmet. The shroud includes a front surface and a rear surface and the shroud is configured to be coupled to an accessory device. A flexible element is coupled to the shroud and configured to at least partially secure the accessory device to the shroud. The flexible element extends through the front surface of the shroud.

A personal protective equipment wearing detection apparatus is provided which can accurately detect the approach or contact of a person's head by use of a plurality of contact detection sensors. A personal protective equipment wearing detection apparatus 100 includes a headband contact detection sensor 110 and a chin strap contact detection sensor 120, which are mounted on a headband 92 and a chin strap 94 of a helmet 90, respectively. The headband contact detection sensor 110 and the chin strap contact detection sensor 120 are connected to a controller 103 of a detection apparatus body 101. While one of the two contact detection sensors, the headband contact detection sensor 110 and the chin strap contact detection sensor 120, outputs a contact detection signal to the controller 103, the controller 103 connects the other contact detection sensor to GND.

A device includes a collar and at least one pad. The collar is configured for wearing by a user, the collar having a plurality of pad receptacles. The at least one pad is configured for coupling with a selected one of the plurality of pad receptacles, the pad having an elastic portion configured to limit movement of a user.