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bottom time: meaning, definition, pronunciation and examples

Low
UK/ˈbɒtəm taɪm/US/ˈbɑːtəm taɪm/

Technical/Specialized

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Quick answer

What does “bottom time” mean?

In scuba diving, the total time spent underwater from descent to ascent.

Audio

Pronunciation

Definition

Meaning and Definition

In scuba diving, the total time spent underwater from descent to ascent.

In technical diving, the cumulative time spent at a specific depth requiring decompression stops.

Dialectal Variation

British vs American Usage

Differences

Term is identical in both varieties; no regional variation in meaning.

Connotations

Neutral technical term in both regions.

Frequency

Equally rare in general English; common only in diving communities worldwide.

Grammar

How to Use “bottom time” in a Sentence

have + bottom timecalculate + bottom timeexceed + bottom timelog + bottom time

Vocabulary

Collocations

strong
maximum bottom timelimited bottom timecalculate bottom timeextend bottom time
medium
adequate bottom timeplanned bottom timeremaining bottom time
weak
short bottom timelong bottom timetotal bottom time

Examples

Examples of “bottom time” in a Sentence

verb

British English

  • We need to bottom-time this dive carefully due to depth.

American English

  • He bottom-timed his dive exactly according to plan.

adjective

British English

  • The bottom-time calculation is critical for safety.

American English

  • Their bottom-time records were meticulously kept.

Usage

Meaning in Context

Business

Not used in general business contexts.

Academic

Used in marine biology field studies documenting dive durations.

Everyday

Virtually never used outside diving contexts.

Technical

Standard term in dive planning, logging, and decompression calculations.

Vocabulary

Synonyms of “bottom time”

Strong

submersion duration

Neutral

dive timeunderwater time

Weak

depth time

Vocabulary

Antonyms of “bottom time”

surface intervaldecompression time

Watch out

Common Mistakes When Using “bottom time”

  • Using 'bottom time' to refer to surface intervals.
  • Counting descent/ascent time separately from bottom time.
  • Confusing with 'dive time' which may include safety stops.

FAQ

Frequently Asked Questions

Not exactly. 'Bottom time' specifically refers to time underwater, while 'dive time' might include surface intervals between dives in some contexts.

Extremely rarely. It's a highly specialized term almost exclusively used in scuba and technical diving contexts.

From the moment a diver begins descent until beginning ascent toward the surface, typically recorded in minutes.

It's crucial for calculating nitrogen absorption and required decompression stops to prevent decompression sickness ('the bends').

In scuba diving, the total time spent underwater from descent to ascent.

Bottom time is usually technical/specialized in register.

Bottom time: in British English it is pronounced /ˈbɒtəm taɪm/, and in American English it is pronounced /ˈbɑːtəm taɪm/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

  • “The clock is ticking on your bottom time.”
  • “Buying bottom time (extending through gas management).”

Learning

Memory Aids

Mnemonic

BOTTOM TIME = B(e) O(n) T(he) O(cean) M(aking) TIME count - the time you're actually at the bottom exploring.

Conceptual Metaphor

TIME AS A RESOURCE (limited, measurable, consumable commodity during diving).

Practice

Quiz

Fill in the gap
Divers must monitor their to avoid decompression sickness.
Multiple Choice

What does 'bottom time' specifically refer to in scuba diving?