Segments of Business (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 29, 2013	Mar. 30, 2012	Mar. 29, 2013	Mar. 30, 2012	Sep. 28, 2012
Segment Reporting Information [Line Items]
Net sales	$ 132,100	$ 128,726	$ 219,374	$ 208,902
Operating profit	12,638	13,981	14,164	10,262
Total assets	346,175	312,880	346,175	312,880	263,632
Marine Electronics [Member]
Segment Reporting Information [Line Items]
Interunit transfers	86	72	105	93
Operating profit	15,594	12,317	20,340	14,390
Unaffiliated customers	87,692	80,184	141,324	127,934
Total assets	163,461	147,124	163,461	147,124	97,261
Outdoor Equipment [Member]
Segment Reporting Information [Line Items]
Interunit transfers	19	13	26	30
Operating profit	(268)	831	(44)	579
Unaffiliated customers	10,077	9,424	18,510	15,697
Total assets	39,265	21,545	39,265	21,545	26,978
Watercraft [Member]
Segment Reporting Information [Line Items]
Interunit transfers	12	13	19	23
Operating profit	(542)	3,061	(2,224)	603
Unaffiliated customers	13,742	17,047	20,549	24,522
Total assets	41,892	48,745	41,892	48,745	32,766
Diving [Member]
Segment Reporting Information [Line Items]
Interunit transfers	342	167	478	305
Operating profit	1,379	1,706	2,081	1,608
Unaffiliated customers	20,473	21,931	38,820	40,551
Total assets	71,402	72,056	71,402	72,056	70,957
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating profit	(3,525)	(3,934)	(5,989)	(6,918)
Unaffiliated customers	116	140	171	198
Total assets	30,155	23,410	30,155	23,410	35,670
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Interunit transfers	$ (459)	$ (265)	$ (628)	$ (451)

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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-Section 03

-Paragraph 12

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Concepts (CON)

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-Paragraph 25

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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