Saab R4-AIS Installation Manual

Also see for R4: Short Instruction guide Operator's manual

Contents

Saab R4-AIS Installation Manual Manual pdf 47 page image

Mounting Page 46Document id: 7000 108-011 A22.16.3.4.2 No ROT availableIf no ROT information is available, the AIS will transmit defaultvalues indicating not available. ROT data will not be derived fromCOG information.2.16.3.4.3 ROT sensor fallback conditionsThe R4 Transponder automatically selects the ROT source with thehighest priority available. The priority scheme is defined by the AISstandard (Ref. [5]).2.16.3.5 Log (VBW)If a Bottom Track (BT) Log (hereafter referred to as Speed Log) forSpeed Over Ground (SOG) is available, it shall be connected to theR4 Transponder.The R4 Transponder will derive Course Over Ground (COG) fromthis information.Note that the R4 Transponder needs heading information to be ableto derive SOG and COG from Speed Log data. The R4 Transponderwill use the Speed Log as source for SOG and COG as long asheading information is available.If heading information is not available, Speed Log data will not beused. In this case the R4 Transponder will use the position sensor assource for SOG and COG.2.16.4 Long Range equipment interface2.16.4.1 Long Range communication systemThe AISí Long Range function needs a compatible long-rangecommunication system (e.g. Inmarsat-C or MF/HF radio).If this is available, a connection between that communication systemand the R4 Transponder can be made. This connection is needed toactivate the LR function of the AIS. Its input/output port must meetthe requirement of IEC 61162-2.2.16.4.2 Long Range functionThe Long Range reply can be set in either:! automatic mode (AUTO)! manual mode (MANUAL) or! manual mode external application (EXT APPL).The Long Range reply, when in AUTO mode, is made as soon as arequest is received on the Long Range communication port.The Officer on the Watch must approve the Long Range reply,when in MANUAL mode, by a means of pressing a keyboardbutton on the display before the reply is performed.