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1.2.7.6.4 Steerpoint Diamond Symbol - In the air-to-ground and navigation modes, the steerpoint diamond (Figure 1-82) is positioned at a point equal to the selected steerpoint plus cursor corrections. 1.2.7.7.10 Window 10 - Displays the measured range from the highest priority tracking sensor and a mnemonic identifying that sensor. (Blu - as an aside, options are F (FCR), T (ATP IMU), L (ATP Laser), R (Radar altimeter), B (steerpoint elevation/barometric data), P (DTS passive ranging) or H (HTS provided ranging). Note that for MULT, PRE, VIS post designate, and MPPRE, its horizontal range instead of slant range.) 1.2.7.7.13 describes window 13, but its got a lot of text. For A-G with no defined target, or for navigation mode, air to air missile, dogfight, or MRM modes... "time to destination is displayed in minutes and seconds; or time of arrival is displayed in hours, minutes, and seconds if TOS mode is selected." 1.2.7.7.14.1 describes window 14, same deal as above. "The selected steerpoint number is displayed at the extreme right side of the window. Distance-to-steerpoint data and steerpoint number are separated by a greater than (>) symbol." 1.3.3.1.4.2.1 Cursor Corrections and Cursor Zeroising - The pilot can slew the navigation solution to correct it to the required performance or to acquire targets. Pilot induced corrections are accumulated and placed in different cursor “buckets” depending on the master mode/VIP/VRP/Snowplow state. So, in summary. Moving the GM cursor in NAV mode is slewing the navigation solution. The diamond is displayed at the steerpoint location, plus cursor corrections. 4.35 does this correctly. Most of the time and distance data should refer to the corrected steerpoint location, but in 4.35 (and older versions) instead refers to the uncorrected steerpoint location. Does that sum it up? |
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It does sum it up with a remark that in BMS this behaviour is documented (see attached manual entry). grafik.png (144,676 bytes) |
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This is unusual to me, because the MMC doesn't distinguish between the STPT and the SPI. They are the same thing. Window 13 (ETE or ETA) shouldn't change between master modes. Same for window 14 (Distance to go). |
- Anonymous
