| Flag | SiRF Message | Value |
| LOG_NONE | None | 0x00000000 |
| LOG_TrueNavigation | 0x01 | 0x00000001 |
| LOG_MeasuredNavigation | 0x02 | 0x00000002 |
| LOG_TrueTracker | 0x03 | 0x00000004 |
| LOG_MeasuredTracker | 0x04 | 0x00000008 |
| LOG_RawTrkData | 0x05 | 0x00000010 |
| LOG_SWVersion | 0x06 | 0x00000020 |
| LOG_ClockStatus | 0x07 | 0x00000040 |
| LOG_50BPS | 0x08 | 0x00000080 |
| LOG_ThrPut | 0x09 | 0x00000100 |
| LOG_Error | 0x0A | 0x00000200 |
| LOG_Ack | 0x0B | 0x00000400 |
| LOG_Nak | 0x0C | 0x00000800 |
| LOG_VisList | 0x0D | 0x00001000 |
| LOG_Almanac | 0x0E | 0x00002000 |
| LOG_Ephemeris | 0x0F | 0x00004000 |
| LOG_TestModeData | 0x10 | 0x00008000 |
| LOG_RawDGPS | 0x11 | 0x00010000 |
| LOG_OkToSend | 0x12 | 0x00020000 |
| LOG_RxMgrParams | 0x13 | 0x00040000 |
| LOG_TestModeData2 | 0x14 | 0x00080000 |
| LOG_NetAssistReq | 0x15 | 0x00100000 |
| LOG_StopOutput | 0x16 | 0x00200000 |
| LOG_CompactTracker | 0x17 | 0x00400000 |
| LOG_DRCritSave | 0x18 | 0x00800000 |
| LOG_DRStatus | 0x19 | 0x01000000 |
| LOG_DRHiRateNav | 0x1A | 0x02000000 |
| LOG_DGPSStatus | 0x1B | 0x04000000 |
| LOG_NL_MeasData | 0x1C | 0x08000000 |
| LOG_NL_DGPSData | 0x1D | 0x10000000 |
| LOG_NL_SVStateData | 0x1E | 0x20000000 |
| LOG_NL_InitData | 0x1F | 0x40000000 |
| LOG_ALL | All | 0xFFFFFFFF |