For reasons we're still trying to sort out, Annex M3 was left out of the Harpoon Data Annex Book. It provides precalculated sonar range bands, and while the game is playable without the table, it's a lot easier with it. Besides, we meant for it to be there.

Annex M3 Sonar Range Bands
Base Range	P d 75%	P d 50%	P d 25%
0.5	0.2	0.6	0.8
1.0	0.4	1.1	1.5
1.5	0.6	1.7	2.3
2.0	0.8	2.2	3.0
2.5	1.0	2.8	3.8
3.0	1.2	3.3	4.5
3.5	1.4	3.9	5.3
4.0	1.6	4.4	6.0
4.5	1.8	5.0	6.8
5.0	2.0	5.5	7.5
5.5	2.2	6.1	8.3
6.0	2.4	6.6	9.0
6.5	2.6	7.2	9.8
7.0	2.8	7.7	10.5
7.5	3.0	8.3	11.3
8.0	3.2	8.8	12.0
8.5	3.4	9.4	12.8
9.0	3.6	9.9	13.5
9.5	3.8	10.5	14.3
10.0	4.0	11.0	15.0
10.5	4.2	11.6	15.8
11.0	4.4	12.1	16.5
11.5	4.6	12.7	17.3
12.0	4.8	13.2	18.0
12.5	5.0	13.8	18.8
13.0	5.2	14.3	19.5
13.5	5.4	14.9	20.3
14.0	5.6	15.4	21.0
14.5	5.8	16.0	21.8
15.0	6.0	16.5	22.5

Annex M3 Sonar Range Bands
Base Range	P d 75%	P d 50%	P d 25%
15.5	6.2	17.1	23.3
16.0	6.4	17.6	24.0
16.5	6.6	18.2	24.8
17.0	6.8	18.7	25.5
17.5	7.0	19.3	26.3
18.0	7.2	19.8	27.0
18.5	7.4	20.4	27.8
19.0	7.6	20.9	28.5
19.5	7.8	21.5	29.3
20.0	8.0	22.0	30.0
20.5	8.2	22.6	30.8
21.0	8.4	23.1	31.5
21.5	8.6	23.7	32.3
22.0	8.8	24.2	33.0
22.5	9.0	24.8	33.8
23.0	9.2	25.3	34.5
23.5	9.4	25.9	35.3
24.0	9.6	26.4	36.0
24.5	9.8	27.0	36.8
25.0	10.0	27.5	37.5
25.5	10.2	28.1	38.3
26.0	10.4	28.6	39.0
26.5	10.6	29.2	39.8
27.0	10.8	29.7	40.5
27.5	11.0	30.3	41.3
28.0	11.2	30.8	42.0
28.5	11.4	31.4	42.8
29.0	11.6	31.9	43.5
29.5	11.8	32.4	44.3
30.0	12.0	33.0	45.0

Annex M3 Sonar Range Bands
Base Range	P d 75%	P d 50%	P d 25%
30.5	12.2	33.6	45.8
31.0	12.4	34.1	46.5
31.5	12.6	34.7	47.3
32.0	12.8	35.2	48.0
32.5	13.0	35.8	48.8
33.0	13.2	36.3	49.5
33.5	13.4	36.9	50.3
34.0	13.6	37.4	51.0
34.5	13.8	38.0	51.8
35.0	14.0	38.5	52.5
35.5	14.2	39.1	53.3
36.0	14.4	39.6	54.0
36.5	14.6	40.2	54.8
37.0	14.8	40.7	55.5
37.5	15.0	41.3	56.3
38.0	15.2	41.8	57.0
38.5	15.4	42.4	57.8
39.0	15.6	42.9	58.5
39.5	15.8	43.5	59.3
40.0	16.0	44.0	60.0
40.5	16.2	44.6	60.8
41.0	16.4	45.1	61.5
41.5	16.6	45.7	62.3
42.0	16.8	46.2	63.0
42.5	17.0	46.8	63.8
43.0	17.2	47.3	64.5
43.5	17.4	47.9	65.3
44.0	17.6	48.4	66.0
44.5	17.8	49.0	66.8
45.0	18.0	49.5	67.5

Annex M3 Sonar Range Bands
Base Range	P d 75%	P d 50%	P d 25%
45.5	18.2	50.1	68.3
46.0	18.4	50.6	69.0
46.5	18.6	51.2	69.8
47.0	18.8	51.7	70.5
47.5	19.0	52.3	71.3
48.0	19.2	52.8	72.0
48.5	19.4	53.4	72.8
49.0	19.6	53.9	73.5
49.5	19.8	54.5	74.3
50.0	20.0	55.0	75.0
50.5	20.2	55.6	75.8
51.0	20.4	56.1	76.5
51.5	20.6	56.7	77.3
52.0	20.8	57.2	78.0
52.5	21.0	57.8	78.8
53.0	21.2	58.3	79.5
53.5	21.4	58.9	80.3
54.0	21.6	59.4	81.0
54.5	21.8	60.0	81.8
55.0	22.0	60.5	82.5
55.5	22.2	61.1	83.3
56.0	22.4	61.6	84.0
56.5	22.6	62.2	84.8
57.0	22.8	62.7	85.5
57.5	23.0	63.3	86.3
58.0	23.2	63.8	87.0
58.5	23.4	64.4	87.8
59.0	23.6	64.9	88.5
59.5	23.8	65.5	89.3
60.0	24.0	66.0	90.0

BT