Abstract: An object is to provide a data collection device and the like capable of reducing a load on an IoT terminal in metadata transmission and power consumption associated with the metadata transmission. In the present invention, a controller is provided on a data collection side that collects metadata, the metadata transmitted from an IoT terminal is grasped, and the IoT terminal is instructed to reduce the transmission frequency of metadata that does not need high real-time property according to a sensor, the type of the IoT terminal, or the like. The IoT terminal transmits the metadata only at a window time (transmission timing, data size, metadata type, or the like) permitted by the metadata controller. As a result, the IoT terminal transmits the metadata only at a limited timing, and thus can reduce a transmission load and power consumption.

Abstract: An objective is to provide a terminal device, a communication method, and a communication system in which the time taken by connection operations/authentication operations does not increase proportionally with the pattern length, even if the transmitting side and the receiving side are not synchronized. A terminal device, a communication method, and a communication system according to the present invention create n pieces of signal information (n-bit patterns) by sequentially shifting each bit of a single piece of received signal information (n-bit pattern) one bit at a time. Through the above, signal information time-shifted by one bit each is obtained. Thus, even if the transmitting side and the receiving side are not synchronized, one of the n pieces of signal information is a signal synchronized with the transmitting side. Thereafter, the signal synchronized with the transmitting side can be detected by a brute-force calculation with the patterns (ID information) in the list.

Abstract: An object is to provide a technique related to a small watercraft that can prevent water from entering an inboard section through air intake ports. A small watercraft for leisure use is configured to obtain thrust by driving a propeller with an engine serving as a power source and includes an air intake port configured to introduce air into an engine room in an inboard section from the outside, and a radar arm configured to support a radar. The air intake port is positioned on the inner side with respect to the radar arm.

Abstract: A space of an inboard section can be effectively used and thus a compartment can have a larger space (living space) compared with a configuration in which walls (inner wall materials) stand in a vertical direction in the inboard section. An object is to provide a technique related to a watercraft. A watercraft 1 for leisure use that is used for sports, recreations, and the like includes a compartment formed with an inner wall material 54 provided on an inboard section in such a manner as to be curved in accordance with a shape of the inboard section.

Abstract: An object is to provide a technique related to a small watercraft that can prevent water from entering an inboard section through air intake ports. A small watercraft for leisure use is configured to obtain thrust by driving a propeller with an engine serving as a power source and includes an air intake port configured to introduce air into an engine room in an inboard section from the outside, and a radar arm configured to support a radar. The air intake port is positioned on the inner side with respect to the radar arm.