# PWR-217 — Non-human environmental sensing: learner worksheet Release: Revision 7T · Full Tutorial Edition Estimated time: Estimated 24 min reading and worksheet pass Difficulty: Intermediate Equipment: Basic stationery or digital tools — Eight supplied NorthCue v1 records: card 1 reads 004 degrees, age 5 seconds, quality OK, reference 000 degrees; card 2 reads 081 degrees, age 8 seconds, quality OK, reference 090 degrees; card 3 reads 198 degrees, age 12 seconds, quality OK, reference 180 degrees; card 4 reads 276 degrees, age 20 seconds, quality OK, reference 270 degrees; card 5 reads 012 degrees but is 45 seconds old; card 6 reads 090 with no unit; card 7 reads 182 degrees with quality LOW; card 8 has no reading. The age limit is 30 seconds and the tolerance is plus or minus 15 degrees.; The supplied answer key: absolute errors for cards 1 to 4 are 4, 9, 18 and 6 degrees; cards 1, 2 and 4 pass, card 3 misses, and cards 5 to 8 require abstention for stale age, missing unit, LOW quality and missing value respectively.; A two-pattern visual or optional gentle tactile code legend, a timer and a record sheet. Space: Desk / seated Automated structural checklist: 10 of 10 structural checks present Evidence quality/context: G2; Detailed research depth Automated method-quality band: Comprehensive Method-rating basis: Structure coverage, instruction/check specificity, alternative distinctness, source troubleshooting, comparison depth and whether purpose/check fields are authored rather than derived. Editorial review: Pending manual editorial sign off ## Before you begin - [ ] I read the tutorial authority and stop conditions. - [ ] I have the required equipment/space or a declared accessible alternative. ## Canonical source context This lesson teaches low-stakes quality control for non-human sensing. Interpret a NorthCue packet; check degree units, timestamps plus quality codes; compare four usable headings with references; map misses versus abstentions; reject stale, unitless, LOW-quality or empty records. Nothing here authorises live environmental or navigation decisions. Target outcome: Learner classifies eight NorthCue records, including four unusable entries, then states which findings depend on sensor version, code legend plus 15-degree tolerance. ### Authority and setup conditions - Use only fictional, public-domain or learner-owned data; do not connect a live sensor. - Choose a seated desk task with no navigation, hazard detection or consequential decision. - Predeclare the sensor name, mapping version, tolerance, replay limit and the rule: missing unit, time or quality means abstain. ### Required or supplied materials - Eight supplied NorthCue v1 records: card 1 reads 004 degrees, age 5 seconds, quality OK, reference 000 degrees; card 2 reads 081 degrees, age 8 seconds, quality OK, reference 090 degrees; card 3 reads 198 degrees, age 12 seconds, quality OK, reference 180 degrees; card 4 reads 276 degrees, age 20 seconds, quality OK, reference 270 degrees; card 5 reads 012 degrees but is 45 seconds old; card 6 reads 090 with no unit; card 7 reads 182 degrees with quality LOW; card 8 has no reading. The age limit is 30 seconds and the tolerance is plus or minus 15 degrees. - The supplied answer key: absolute errors for cards 1 to 4 are 4, 9, 18 and 6 degrees; cards 1, 2 and 4 pass, card 3 misses, and cards 5 to 8 require abstention for stale age, missing unit, LOW quality and missing value respectively. - A two-pattern visual or optional gentle tactile code legend, a timer and a record sheet. ## 1. Name the hidden signal Write an exact signal—magnetic heading in degrees—plus a harmless question this NorthCue packet will answer. Why: A label such as “environment sense” hides what the device actually measures. Success check: The record names one signal, unit, task and non-use. Accessible alternative: Complete the same research action — “Write an exact signal—magnetic heading in degrees—plus a harmless question this NorthCue packet will answer.” — using speech-to-text, text-to-speech, enlarged text, keyboard-only navigation, shorter work blocks or a support person. Preserve this declared check: “The record names one signal, unit, task and non-use.” Do not convert the research task into capability practice. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 2. Check the sensor identity Read sensor name, mapping version plus observation time on every card before decoding any value. Why: A reading from the wrong sensor, mapping or time cannot be compared fairly. Success check: Every card has a matched identity and version or is marked unusable. Accessible alternative: Complete the same research action — “Read sensor name, mapping version plus observation time on every card before decoding any value.” — using speech-to-text, text-to-speech, enlarged text, keyboard-only navigation, shorter work blocks or a support person. Preserve this declared check: “Every card has a matched identity and version or is marked unusable.” Do not convert the research task into capability practice. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 3. Check unit, age and quality Circle each unit; compare record age with a 30-second limit; note any calibration or LOW-quality flag. Why: A precise-looking number can still be stale, unitless or flagged. Success check: The stale, unitless and quality-warning cards are not silently treated as valid. Accessible alternative: Complete the same research action — “Circle each unit; compare record age with a 30-second limit; note any calibration or LOW-quality flag.” — using speech-to-text, text-to-speech, enlarged text, keyboard-only navigation, shorter work blocks or a support person. Preserve this declared check: “The stale, unitless and quality-warning cards are not silently treated as valid.” Do not convert the research task into capability practice. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 4. Decode without the answer key Use a declared code legend once, state inferred heading plus confidence, then lock that answer before revealing its reference. Why: Locking the answer separates interpretation from copying. Success check: Each valid card has one recorded response, confidence and replay count. Accessible alternative: Complete “Use a declared code legend once, state inferred heading plus confidence, then lock that answer before revealing its reference.” in shorter passes, or use keyboard input, dictation or a support person, while preserving this success check: “Each valid card has one recorded response, confidence and replay count.” Increase text and symbol size, allow keyboard entry and extend response time without changing the reference tolerance. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 5. Compare with the reference Calculate absolute heading error for valid cards and record false alarms, misses and code confusions separately. Why: An average can hide a repeated left/right or code-pair confusion. Success check: The sheet shows error for each valid card and names each error type. Accessible alternative: Complete the same research action — “Calculate absolute heading error for valid cards and record false alarms, misses and code confusions separately.” — using speech-to-text, text-to-speech, enlarged text, keyboard-only navigation, shorter work blocks or a support person. Preserve this declared check: “The sheet shows error for each valid card and names each error type.” Do not convert the research task into capability practice. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 6. Test the alternative channel Decode two matched records through a visual or manual legend instead of an augmented cue; record changed support explicitly. Why: This reveals whether the result belongs to a specific code or device. Success check: Device/code and alternative-channel results are reported separately. Accessible alternative: Complete the same research action — “Decode two matched records through a visual or manual legend instead of an augmented cue; record changed support explicitly.” — using speech-to-text, text-to-speech, enlarged text, keyboard-only navigation, shorter work blocks or a support person. Preserve this declared check: “Device/code and alternative-channel results are reported separately.” Do not convert the research task into capability practice. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## 7. Make a fit-or-abstain decision For each card choose fit for this fictional task, unfit, or uncertain, and give the exact reason. Why: Environmental sensing includes knowing when the data cannot support a decision. Success check: No missing, stale or flagged record receives an unqualified fit decision. Accessible alternative: Complete “For each card choose fit for this fictional task, unfit, or uncertain, and give the exact reason.” in shorter passes, or use keyboard input, dictation or a support person, while preserving this success check: “No missing, stale or flagged record receives an unqualified fit decision.” Increase text and symbol size, allow keyboard entry and extend response time without changing the reference tolerance. Alternative relationship: Target preserving when declared check is preserved Learner notes: ________________________________________________________________________________ Completed: [ ] ## Reflection What changed? ________________________________________________________________________________ What remains difficult? ________________________________________________________________________________ What will I repeat, adapt, ask for help with, or stop? ________________________________________________________________________________ --- Completion of this worksheet demonstrates tutorial participation only. It does not establish capability, qualification, safety clearance, diagnosis, treatment or independent validation.