![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
J2B Radio transmission designator>br>Telegraphy (automatic reception of), single-sideband (suppressed carrier) with a single channel containing quantized or digital information with the use of a modulating sub-carrier. (ALRS)
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
J2DEN Radio transmission designatorSingle-sideband suppressed carrier with a single channel containing quantized or digital information with the use of a modulating sub-carrier. Data transmission with a multi-condition code in which each condition repre ...
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
J3E Radio transmission designatorTelephony using amplitude modualtion; single-sideband, suppressed carrier. (ALRS)
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
Safety lines, usually of flat webbing, that run along the deck between bow and stern used to attach a tether from a safety harness.
![](https://www.marineterms.com/media/com_mtree/images/noimage_thb.png)
Four-masted sailing ship square-rigged on the two foremost masts and fore-and-aft rigged on the two after masts.